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Inverted cowl

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Old Sep 24, 2005 | 10:45 AM
  #1  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Inverted cowl

I have 2 spare hoods laying around the garage. One is a cervini and the other is a glass 83Z hood. My plan is to take one of the hoods and modify the look. Im thinking if I do the 83 hood I could slice the center section, raise it up 2" and extend the length so it looks normal, then cut the center of the center section I just cut up and put the reverse cown where the factory scoops are so that they would be in the reverse cowl.
Or I could just cut up the cervini hoods center section and put the reverse cowl in it.
Thoughts?
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Old Sep 24, 2005 | 08:42 PM
  #2  
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From: colorado
Car: 1992 Trans/am convertible
Engine: 305 TPI
Transmission: 700r4
Axle/Gears: 2.73 drum WS6
sounds cool!

I think the hood would get your drag number higher, thus increasing your drag, but your engine will get more cool air.
Now you have to think of how to close up that scoop, or put in some kind of berrier, so you don't suck up animals, rodents and such

I have a fake Pro/am cowl hood. I am actually thinking of taking it off, cutting the air cleaner area off the hood and making an outlet for the air to get scooped in.

We'll see how that works.
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Old Sep 25, 2005 | 12:16 AM
  #3  
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i think you should sell me that 83 glass hood
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Old Sep 26, 2005 | 05:54 PM
  #4  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Well I decided to do the 83 hood. I am starting tonight. I will post picks of the build after I get started cutting.
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Old Sep 26, 2005 | 07:19 PM
  #5  
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I've seen Revlimit make one with the steel hood. He just cut it and bent it in then worked the edges. Looked pretty good. Dunno about doing it to a glass hood, fiberglass dosnt like to bend if its brittle. I cut out the vents in my 82/83 hood, looks cool but when it rains water runs down the plennum and either lands on the sensors in the front or dizzy on the back so thats not too cool.
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Old Sep 26, 2005 | 07:37 PM
  #6  
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From: Rockville, Maryland
Car: 1986 Z28 Camaro Gunmetal Gray with
Engine: GM Crate ZZZ HO 350, Edelbrock head
Transmission: Rebuilt 700r4 all TransGo and Beast
Axle/Gears: 10 bolt with 3.73 gears
now, the next step is to give me the cervini hood

post pics of your project along the way, this sounds interesting.
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Old Sep 26, 2005 | 08:22 PM
  #7  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Having trouble figuring out what size cowl to make it? Will work on more tomorrow.
Attached Thumbnails Inverted cowl-cowl-1.jpg  
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Old Sep 26, 2005 | 09:33 PM
  #8  
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Car: 1985 camaro
here is my hood, its 2 1/2 on the sides and 3 in the middle. The back has the overhang added from another camaro hood, I just welded it on the back.
Attached Thumbnails Inverted cowl-angle.jpg  
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Old Sep 26, 2005 | 09:34 PM
  #9  
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another view
Attached Thumbnails Inverted cowl-back-angel.jpg  
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Old Sep 28, 2005 | 06:51 PM
  #10  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
It's coming along!!
As you can see I put a 1" cowl in the middle of the hood and 3/4" at the top.
Attached Thumbnails Inverted cowl-invert2.jpg  
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Old Sep 28, 2005 | 06:52 PM
  #11  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
This photo is with the 2" invert that I started working on.
Attached Thumbnails Inverted cowl-invert1.jpg  
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Old Sep 28, 2005 | 07:55 PM
  #12  
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Car: 91 Z28
Engine: LS1
Transmission: T-56
Axle/Gears: 3.73 Hawks 8.8
Your going to have so many people jelious of you

Seriously though, with the amount of people on the forums that have said they want that jap hood, you should make a mold of yours and sell em.
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Old Sep 29, 2005 | 01:01 AM
  #13  
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From: garland,tx
Car: 1988 gta
Engine: 5.7
Transmission: turbo 350
lookin good!
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Old Sep 29, 2005 | 10:07 AM
  #14  
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Car: 1993 GMC Typhoon
Engine: 4.3 Turbo
Transmission: 4L60
Axle/Gears: 3.42
make me one!!!!
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Old Sep 30, 2005 | 06:45 PM
  #15  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Now that the easy part is done, it's time to start the crap work. I will be thinking about making more if this turns out good. We'll see? Everything will depend on how it looks once painted. You can't get the feel for it until you see the curves with the paint on.
Attached Thumbnails Inverted cowl-dscf0019.jpg  
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Old Sep 30, 2005 | 09:22 PM
  #16  
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From: Pleasant Grove, Utah
Car: 1993 GMC Typhoon
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Transmission: 4L60
Axle/Gears: 3.42
well if you do.. i want to be 1st line to get one..
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Old Oct 3, 2005 | 09:38 PM
  #17  
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From: colorado springs, colorado, USA
Car: 83-84 camaro, 95 formula firehawk
Engine: 305, 305ho, 350tpi, 350 lt1, 383lt1
Transmission: 700r4, t-5, t56, m6
Axle/Gears: 3:90, 4:10, 3:50, and more
looks awsome!!!!!!!!!!!!!!!! i want a hood like that so bad..... i have a glass 83z hood.... hmmmmmm
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Old Oct 8, 2005 | 03:37 AM
  #18  
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From: Chico/Antioch California
Car: 1989 iroc Z Hardtop
Engine: 350 tpi
Transmission: 700r4
Im liking it a lot so far... keep up the good work!

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Old Oct 8, 2005 | 11:16 PM
  #19  
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Car: '91 Z28 & '90 RS Vert & '89 RS
Engine: 5.7L & none & 2.8L (soon to be LSX)
Transmission: yes
Axle/Gears: One's with teeeeefs
any updates ?
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Old Oct 9, 2005 | 10:19 AM
  #20  
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doenst mustang 00-03 have a hood similiar to the hood your making? i thought i saw one on there the other day in my home town. i could be wrong. it hink its just in the opposite direction.

anyone knoe?
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Old Oct 9, 2005 | 02:58 PM
  #21  
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From: Chico/Antioch California
Car: 1989 iroc Z Hardtop
Engine: 350 tpi
Transmission: 700r4
I believe your talking about the 02-04 cobra hoods...

The inverted cowl hoods were on the blown dohc'ed cobras... watch out for those.

They do look really cool...
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Old Oct 9, 2005 | 07:28 PM
  #22  
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From: So.west IN
Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
They are on the plain jane v6 mustangs as well. If one were to build the opening to that size, they could just buy the grille from a dealer instead of trying to make one.

2004 3.8 mustang..
Attached Thumbnails Inverted cowl-image1.jpg  
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Old Oct 10, 2005 | 01:46 AM
  #23  
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From: Chico/Antioch California
Car: 1989 iroc Z Hardtop
Engine: 350 tpi
Transmission: 700r4
No not those, that is the same idea but much milder then what im thinking about.

Edit: the hood im thinking of must have been aftermarket, similar to the cobra R hood in that it has a "power bulge"(centered on the hood instead of to the side like a t/a) and yet it led into an inverted cowl shape on the leading edge of the bulge..."

Awesome looking hood that a friend of mine in high school had on his 2003 Cobra i assumed it was a limited year factory piece but i have not been able to find a pick of it online so maybe not

Last edited by rocluvr0013; Oct 10, 2005 at 02:02 AM.
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Old Oct 10, 2005 | 07:01 PM
  #24  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Nothing new to show yet, still doing a lot of mudding. Will post some pics when it gets closer.
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Old Oct 10, 2005 | 07:45 PM
  #25  
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yeah i was just tryin to get an idea of what you were doing exactly. i think thats a cool idea. post some pics when you have some progress to show
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Old Oct 25, 2005 | 04:17 AM
  #26  
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From: Chico/Antioch California
Car: 1989 iroc Z Hardtop
Engine: 350 tpi
Transmission: 700r4
Any updates?
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Old Nov 29, 2005 | 04:06 PM
  #27  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Well I got a little side tracked. Nothing new yet but I am on vaction next week and will start working on it again. My car got hit in the front that changed a few goals. I know have a supercharger on order Now the inverted caw is be rethought. I got to many waves on the invert and it's driving me crazy, so I decided that now I am going to use plexi glass for the middle section and leave it clear so you can see through. It should show the tpi itself and hopfully the supercharger. This is the new plan. I think if I can pull it off this will be very awesome.
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Old Dec 5, 2005 | 04:35 PM
  #28  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
The hood should be done tomorrow with the exception of paint. To cold! It will end up being a reverse open as well as a inverted cowl. This was the set up I used many years ago and now I am moving it to the new car. I will post more picks tomorrow. Just doing so mud work.
Attached Thumbnails Inverted cowl-dscf0025.jpg  
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Old Dec 5, 2005 | 04:48 PM
  #29  
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Car: '91 Z28 & '90 RS Vert & '89 RS
Engine: 5.7L & none & 2.8L (soon to be LSX)
Transmission: yes
Axle/Gears: One's with teeeeefs
That looks awesome..... Did you go back and do it with the plexi, or just fix what you had?
Does the car in the pic have an engine? What type of induction? If TPI, how well does it clear the throttle body and is there enough room to run a filter????
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Old Dec 5, 2005 | 06:03 PM
  #30  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
No I skipped the plexi. Couldn't figure out how tp mold the 2 together so I fixed what I had. It's turning out very well.
I have only test fit it once but it was sitting just like you see it but it all looked to fit well. I have a KN filter on it and it looks like their should be no problems. The invert drops about one inch behind the radiator. I will take picks tomorrow when I get it on.
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Old Dec 7, 2005 | 04:59 PM
  #31  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Not on the car yet but here are a couple of almost done pics. Hopefully tomorrow, if I don't continue to pick it to death!
Attached Thumbnails Inverted cowl-two.jpg  
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Old Dec 7, 2005 | 05:56 PM
  #32  
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Nice craftsmanship it looks great!

Will this be going on your Z?
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Old Dec 7, 2005 | 07:14 PM
  #33  
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Car: 1989 GTA
Engine: Future: LSX Turbo
Transmission: built T-56
NICE! hey man i sent you a pm looking good tho
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Old Dec 7, 2005 | 07:21 PM
  #34  
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From: indiana, pa
Car: 85 TA
Engine: dont wanna talk about it
Transmission: 700r4 for now
very nice...i need one of them for my bird
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Old Dec 7, 2005 | 08:18 PM
  #35  
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From: louisiana
Car: 92 RS and 98 3000gt
Engine: 305tbiv8 / 2998v6
Transmission: 4 speed autos
who do i make the check out to for mine? ;-P........what were the total man-hours one the fab.?,looks great btw,with those skillz,if i were you....i wouldn't stop at the hood,hmmmm,custom fender flares/vents and ground-effect mods FTW!! $$$$
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Old Dec 8, 2005 | 04:37 PM
  #36  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Well it done enough until spring. Still a good bit of primingand sanding come spring but for now I'm done. This hood looks great in all the photos and while it's on the bench, but once I put it on the car I don't know if I like it? Even in the photos of it on the car it looks good but in person I don't think it looks as good. Maybe I need to get used to it but if not come spring going back to the stock 92 hood.
Well here you all go!
Attached Thumbnails Inverted cowl-finished.jpg  
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Old Dec 8, 2005 | 04:53 PM
  #37  
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that looks sick dude, nice work!
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Old Dec 8, 2005 | 04:54 PM
  #38  
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From: St. Louis, MO
Car: 85' Firebird (Project), 92' RS
Engine: 2.8L, LS1
Transmission: 700R4, 4L60E
Axle/Gears: 3.42 Open , 10 Bolt (ukn)
Well, that looks awesome, litterally....i love it. I'm planning on having an extractor hood made up for my bird, i'll either be copying the 93-97 styled hoods, or, the firehawk hood, more likely the latter, as it'll be a little more smooth.

On the mustang style you're thinking, the cobra used a hood that i believe you're talking about. It's wider than that one, and a little more deep also, also believe it had the straight piece goingthroughout the middle (flat part)...
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Old Dec 8, 2005 | 04:55 PM
  #39  
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From: Metter, Ga
Car: 1992 Camaro z28
Engine: 350 HSR
Transmission: 700R4
Axle/Gears: 3.42's
Looks really good............great work.


On the car though it def looks alittle weird.........I wanna see it painted .
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Old Dec 8, 2005 | 05:12 PM
  #40  
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Car: 1991 Camaro Z28
Engine: L98 5.7 V8 TPI
Transmission: 700R4
The hood looks awesome! Good work man.
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Old Dec 8, 2005 | 06:48 PM
  #41  
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Car: 1985 Trans Am
Engine: vee eight
Transmission: auto
Axle/Gears: 4.10 gears
that looks cool , i like it .
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Old Dec 8, 2005 | 07:11 PM
  #42  
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i def think it looks good, if you end up deciding you dont like it, ill take it off yur hands
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Old Dec 8, 2005 | 07:17 PM
  #43  
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From: Red Lion, PA
Car: 91 Camaro RS, 99 Camaro Z28
Engine: L03, LS1
Transmission: 700R4, T56
Axle/Gears: bunch of 10 bolts how scary is that
Holy Sh*t that looks good!....
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Old Dec 8, 2005 | 08:08 PM
  #44  
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looks very nice, good work. you say it's a 1" cowl.. is that where you cut it on the cowl or just started where you did and built it up to 1". the version i'm working on it's roughly 1 1/2" at the cowl so it's slightly closer to the windshield.

looks sharp!



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Old Dec 8, 2005 | 09:47 PM
  #45  
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From: ohio
Car: 88IROC vert and a 83 w/evo body
Engine: 400 and 350
Transmission: T56 and 700R4
Axle/Gears: 323 and 373
Accually it's one inch at the opening of the invert and about 3/4" at the cowl, so I lost about 1 to 1 1/2" of under hood clearance with the invert by the raidiator.
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Old Dec 9, 2005 | 08:57 AM
  #46  
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From: Tomball, TX
Car: 89 TTA
Engine: Turbo 3.8
Transmission: 200R4
Looks good. Excellent craftsmanship! I think the only way it could look better is if it was done to a stock hood with a the inverse cowl wider.
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Old Dec 9, 2005 | 03:27 PM
  #47  
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From: Chico/Antioch California
Car: 1989 iroc Z Hardtop
Engine: 350 tpi
Transmission: 700r4
Invert Cowl

I think it looks beautiful in the pictures

Get some paint on it.
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Old Dec 9, 2005 | 04:25 PM
  #48  
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From: Ontario, Canada
Car: 1987 Iroc-Z/1993 Z28/2011 Corvette
Engine: 350 CI TPI/355 CI LT1
Transmission: 700R4/D&D Performance T56
Axle/Gears: 3.27 9-bolt/3.73 10-Bolt
I'm impressed. In those pictures, it looks great!
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Old Dec 9, 2005 | 04:53 PM
  #49  
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From: Chico/Antioch California
Car: 1989 iroc Z Hardtop
Engine: 350 tpi
Transmission: 700r4
If you were to try again maybe id say widen the cowl so it starts at the stock lines in the hood. (i hope that makes sense) That way it would accentuate the factory body lines and you could make the opening a little wider...

Thats not to say i dont still love it; just throwin out suggestions
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Old Dec 9, 2005 | 07:05 PM
  #50  
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From: Tacoma, Wa
Car: '91 TA vert
Engine: turboLSx
Transmission: T56
Axle/Gears: 3.23
Like the jongbloed(who the hell knows how to spell this anyways?) hood with an inverted section?
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