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Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

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Old 08-01-2009, 11:21 PM   #1
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Join Date: Mar 2008
Location: 813,fl valrico
Posts: 40
Car: 89 camaro
Engine: 68-454,87-nothing yet,88gta-305 tpi
Transmission: stock 700r4
Axle/Gears: borg warner 9-bolt/3:27 gears

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need alot of help please let me know

462624.....75-86...350/400......76cc chamber... are these good heads? whats the dealhow with them i have a 350 with a erson hi fl cam and a victor jr intake. how will these heads do?????
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Old 08-01-2009, 11:56 PM   #2
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Join Date: Jul 2005
Posts: 87
Car: 1991 Z-28
Engine: 350 L98 al head Stealth Ram
Transmission: 700r4
Axle/Gears: 3.42 LS1 brakes

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Re: need alot of help please let me know

I would recommend getting a set of World torquer S/R's or whatever they're called now . Brand new with all new parts . You can get them in 64 cc chambers to bump the compression too . Or Summit brand . The old heads will almost cost the same as new ones by the time you get them ready . When I was doing lots of stock motors I was throwing away about 1/2 due to cracks etc .
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Old 08-02-2009, 12:45 AM   #3
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Join Date: Mar 2008
Location: 813,fl valrico
Posts: 40
Car: 89 camaro
Engine: 68-454,87-nothing yet,88gta-305 tpi
Transmission: stock 700r4
Axle/Gears: borg warner 9-bolt/3:27 gears

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Re: need alot of help please let me know

well theses are the heads i have. they are not cracked but dirty would porting them help with any thing. are they good heads though?
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Old 08-02-2009, 09:12 PM   #4
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Car: 1991 Z-28
Engine: 350 L98 al head Stealth Ram
Transmission: 700r4
Axle/Gears: 3.42 LS1 brakes

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Re: need alot of help please let me know

unfortunately they are probably small valve , large chamber smog heads . The cracks won't show up til you magnaflux them . That's why I recommended the new heads . For hi perf use you'll need new springs , guides and a valve job probably need them milled . by the time you do all this and add in the time for porting you'll probably spend close to what the new heads cost .
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Old 08-05-2009, 01:01 AM   #5
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Join Date: Oct 2007
Location: Wyoming
Posts: 1,257
Car: 1986 IROC-Z
Engine: LT1 383 Soon
Transmission: Built T-56 Soon
Axle/Gears: 4th Gen 10 Bolt Tru Trac 4.10 Soon

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Re: need alot of help please let me know

Right...getting new assembled heads would be about the same cost as getting old heads worked on and fitted with new parts. I'd get new ones. I like the cast iron Dart and RHS heads. The RHS heads are nice and also cheaper than Darts. Here's a link to the assembled RHS heads. Not a bad price at all, less than a grand for both assembled pieces. I don't know you exact setup, but these might work for you... http://www.cnc-motorsports.com/produ...58&CtgID=26705
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Old 08-05-2009, 02:05 PM   #6
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Car: 82 Berlinetta(2)/57 Bel Air
Engine: LS1 (LS1)/LQ4
Transmission: 4L60E (T56)/4L80E
Axle/Gears: 10B 3.73(9" 4.11)/8.2" 4.11

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Quote:
Originally Posted by jugheads88gta View Post
how will these heads do?????
The unfiltered, honest truth is they are absolute crap.

With the other parts you have, you'll be nothing but disappointed if you try to run those heads. There's just no getting around it.

Can't really say without knowing more details on the cam and what you'll be using the car for (as well as details such as transmission and gears), but I'd guess that Victor Jr. is the wrong intake for you as well.
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Old 08-12-2009, 08:29 AM   #7
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Car: 1989 Camaro RS
Engine: 496 BBC
Transmission: T-56 6 speed
Axle/Gears: 4.11 posi

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Re: need alot of help please let me know

yea for your combo of parts these heads will just frusterate you. they wouldnt be bad for a fairly mild, back yard 383 or the like, but i dont think they can support the flow that your intake and cam can go for. porting them may help a bit, but a set of aftermarket will be much better.

i can understand the part of this is what i have. if the heads have 2.02/ 1.60 valves like mortec.com says they could, then they may be able to do ok, but they are also smog era heads, so they are gonna flow crappy no matter what the valve size pretty much.

i donno, find out what valve size they are, and if its at least not the 1.72/ 1.50 ones, then you can try to make them work.

recommended to go aftermarket irons or the like though to get the power your other parts indicate you want.
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Old 08-12-2009, 08:29 AM
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