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engine drop in with headers on?

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Old Jul 30, 2011 | 11:25 AM
  #1  
Coolball's Avatar
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Car: 82' Z28
Engine: 5.7L 350
Transmission: ST10
Axle/Gears: 3.42
engine drop in with headers on?

Time is closing in on dropping my engine back into the car and after searching I can't find much info on whether or not I can install the headers and drop it in all together. Should I lay the headers out in the engine bay and drop the motor in and connect them then?
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Old Jul 30, 2011 | 12:15 PM
  #2  
Apeiron's Avatar
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: engine drop in with headers on?

Not likely you can do it with the headers installed.
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Old Jul 30, 2011 | 01:31 PM
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From: Middletown, MD
Car: 1983 Z28
Engine: 305
Transmission: 700R4
Re: engine drop in with headers on?

I have Hedman shorties and installed the engine+transmission with the passenger side header bolted on. When the engine was about an 1/2" - 1" or so above the driver side mount, I sneaked the driver side header into position but didn't bolt it on until the engine was secure in the mounts.
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Old Jul 30, 2011 | 01:37 PM
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From: Macedon, near Rochester, NY.
Car: 85 TA (sold), 88 Corvette, 02 Monte
Re: engine drop in with headers on?

Maybe some brands, but its still unlikely. It was a no with my edelbrocks, and they had tiny flanges. Plus the less things in the way when you have an engine swinging around the better. It would be a good idea to tie them in place at the sides of the bay though, less struggle trying to slide them in and less chance of scratching the paint on your engine.
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Old Jul 30, 2011 | 01:42 PM
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From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: engine drop in with headers on?

I did it with SLP shorties (both style) it can b done but I dont recomend it at all..
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Old Jul 30, 2011 | 03:09 PM
  #6  
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Car: 82' Z28
Engine: 5.7L 350
Transmission: ST10
Axle/Gears: 3.42
Re: engine drop in with headers on?

Would it make any difference if everything was removed from the bay? I've been working this on a ground up build so the only thing currently back in the bay is the heater case and steering shaft. I've been holding off on putting all other things back in until the motors back in place. That would be a pretty easy drop I would think with everything on. I'm going to drop the motor and tranny as a pair and was hoping to have headers on too. The cars up on jack stands on all fours too so there's plenty of room below.
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Old Jul 30, 2011 | 03:15 PM
  #7  
Dyno Don's Avatar
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: engine drop in with headers on?

Mine will go in with the right side on ...
Like he said, drop the left side in as the motor goes down in.
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Old Jul 31, 2011 | 12:49 AM
  #8  
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From: San Antonio TX
Car: 1990 G92 IROC Z Miniram
Engine: 388cu 6.4 Liters
Transmission: G-Force T5
Axle/Gears: 3.73 Gears
Re: engine drop in with headers on?

I dropped mine with both headers on with no problem and I have the SLP's 1 3/4 headers. Don't be afraid! Just try it. Once the engine is almost all the way in then start hooking up the wires in back of the heads. It make things a lot eaiser when done that way.
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Old Jul 31, 2011 | 01:09 AM
  #9  
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From: Florida
Car: 89 chevy camaro rs
Engine: 305
Transmission: 700r4
Re: engine drop in with headers on?

did it with edleborck headers had to pull motor mount off block on on side lower engine below headers and re bolt it in
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Old Jul 31, 2011 | 05:20 AM
  #10  
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From: Northern CA.
Car: '82 Z28
Engine: 350
Transmission: TH400 4,000 stall
Axle/Gears: Currie 9", 4.56 gears
Re: engine drop in with headers on?

Think I did it with the Edelbrock headers on... just took a lot of wiggling and checking.
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Old Aug 12, 2011 | 12:13 PM
  #11  
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From: Petawawa Ontario
Car: 1991 firebird formula convertible
Engine: 377 Small block
Transmission: 700R4 Done up
Axle/Gears: 3.42
Re: engine drop in with headers on?

I always leave my headers on and spark plugs on with my edelcrap headers, only thing you need to do is drop the steering shaft to give a little bit of wiggle room or else you are putting the passenger header INTO the air conditioning condensor box (silicone fix anybody)
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Old Aug 12, 2011 | 12:21 PM
  #12  
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From: Houston Area
Car: 1989 IROC-Z
Engine: 355, 6.0 (LQ4) soon
Transmission: 700R4
Axle/Gears: Borg Warner 2.77 for now
Re: engine drop in with headers on?

Didn't work with mine, got tired and took them off. If you have someone helping you it might be possible. I was using the flowtech shorties at the time and it was a very tight fit.
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Old Aug 19, 2011 | 03:30 AM
  #13  
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From: Culpeper, Va
Car: 1989 5.7 IROC Dark Red/Blk 92Z28
Engine: 5.7
Transmission: 700R
Re: engine drop in with headers on?

Originally Posted by stealthroc89
Didn't work with mine, got tired and took them off. If you have someone helping you it might be possible. I was using the flowtech shorties at the time and it was a very tight fit.

LOL Don't you hate when someone says "This is a picture of me when i was younger.." EVERY PICTURE OF SOMEONE IS A PICTURE OF THEM WHEN THEY WERE YOUNGER!!!

stone
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Old Aug 19, 2011 | 07:18 AM
  #14  
thomas1976's Avatar
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From: West-Central
Car: 91 Trans am
Engine: built 360 TBI
Transmission: built 700r4
Axle/Gears: 10bolt/3.23
Re: engine drop in with headers on?

I was lucky, engine minus transmission, came out and went in with headers and acessories.
https://www.thirdgen.org/forums/post...046-post8.html
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Old Aug 19, 2011 | 12:49 PM
  #15  
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From: Lincoln, NE
Car: 86 Z28
Engine: Built 312
Transmission: T5
Axle/Gears: 10 bolt 3.42
Re: engine drop in with headers on?

I dropped mine in with them fully bolted on the last 2 or 3 times. Flotech shorties, though. Don't know that I'd try it w/ LT's, especially with a T5.
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