Header advice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BadHabit · 08-26-2002, 08:29 PM

I would like to hear from anyone as to what they think are a good set of 1 5/8" headers for these trucks with small blocks. I am not even sure what I have on there now but definitely want them gone soon due to rattling.

**JIMs70GMC** · 08-26-2002, 09:14 PM

I bolted on a set of 1962 vette ramhorns w/ 2.5" center. New castings paid $86 a piece. Had 2.5" pipe run out behind the rear wheels through summit "welded" mufflers.

diehardrider · 08-27-2002, 10:26 AM

what about headers for a 4wd with a big block.
What would you guys do to find one that fits?

DaHateTank · 08-27-2002, 10:47 PM

Quote:

Originally posted by diehardrider
what about headers for a 4wd with a big block.
What would you guys do to find one that fits?

I used the Hedman engine swap headers, when I put the 396 in my Blazer. Had to put a SMALL notch in the right framerail, to clear the tube. The frame bulges out there, anyway. If the framerail was straight (ie. like a piece of channel iron) it woulda fit OK. The notch is REALLY mild, if ya didn't know it was there, you wouldn't see it (unlike the notches shown in the caddy engine threads

)

My engine is moved forward an inch, to gain firewall clearance. (I don't like the hammer tactics.) If it was in the stock position, they mighta been OK w/o the notch, or maybe required a small ding.

On the other side, I had to put a ding in one tube, to clear the motor mount. I used the stock 350 mounts, big block spool mounts might have cleared.

Despite all these things, it took a whole 30 minutes, to change the headers, when they rusted out (about 7 years). all in all, Ive had alot worse times, with car headers, that were used in 100% the application they were listed for...

They were pretty cheap, and I actually was pleasantly suprised, by the fit...

Recently, I looked at a '80s Suburban, that had a 454 swapped in, He used Hooker Super Comps, and they looked to fit pretty good, as well... Im pretty sure his engine is in teh stock location, with factory parts (He has a couple big block parts trucks)

HTH

-M

GMC71k20 · 08-28-2002, 02:48 PM

I have dynomax cerama-coat headers on my 71 with a 350. they were only a little over 200 and are warrantied for life, even against rust.

diehardrider · 08-28-2002, 03:00 PM

thanks for the reply Tank
Ill look into those headers. Thats very helpful.
My biggest problem is that somone else did the swap.
I might be putting a new BB and built 700r4 so i might wait till then and do everything the right way.
The way i think i might go is order through Auto zone so i can return the headers and it wont cost me anything and i dont pay for shipping. Then i can try some until i find the ones that need the least modifications.

BadHabit · 08-28-2002, 06:41 PM

That is what I was looking for. So I take it there were no clearance issues. Also, are those full lenght or shorties?

DaHateTank · 08-28-2002, 11:25 PM

another thing to do, if you're gonna swap motors, is pull the front clip off.

take off the bumper, disco the wiring harness and radiator, undo a few bolts, and two guys can lift it off pretty easy.

w/o the front end on it, it was easy to put in the engine, and dink with the headers, etc.

-M

diehardrider · 08-28-2002, 11:46 PM

id love to pull the front clip but from my last truck i have this fear of not putting things back together.
But if i do go for the swap pulling the front clip is something i will do.

GMC71k20 · 08-29-2002, 02:44 PM

badhabit, they are full length and i had no clearance issues at all. they are coated inside and out. they came with everything you need from exhaust manifold gasket to the collector.

BadHabit · 08-29-2002, 03:09 PM

Thanx Jim...BadHabit...

08-26-2002, 08:29 PM	#1
BadHabit Registered User Join Date: Aug 2002 Posts: 11	Header advice I would like to hear from anyone as to what they think are a good set of 1 5/8" headers for these trucks with small blocks. I am not even sure what I have on there now but definitely want them gone soon due to rattling. __________________ 70 Chevy SWB 4x4 350/350/203. 02 Honda VTX. 98 Honda XR400. 88 Honda prelude Si 4WS. 99 Nissan Maxima SE. & one spunky little Jack Russel.

08-26-2002, 09:14 PM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	I bolted on a set of 1962 vette ramhorns w/ 2.5" center. New castings paid $86 a piece. Had 2.5" pipe run out behind the rear wheels through summit "welded" mufflers. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

08-28-2002, 06:41 PM	#7
BadHabit Registered User Join Date: Aug 2002 Posts: 11	Thanx GMC71k20 That is what I was looking for. So I take it there were no clearance issues. Also, are those full lenght or shorties? __________________ 70 Chevy SWB 4x4 350/350/203. 02 Honda VTX. 98 Honda XR400. 88 Honda prelude Si 4WS. 99 Nissan Maxima SE. & one spunky little Jack Russel.

08-29-2002, 03:09 PM	#11
BadHabit Registered User Join Date: Aug 2002 Posts: 11	headers Thanx Jim...BadHabit... __________________ 70 Chevy SWB 4x4 350/350/203. 02 Honda VTX. 98 Honda XR400. 88 Honda prelude Si 4WS. 99 Nissan Maxima SE. & one spunky little Jack Russel.

08-27-2002, 10:26 AM	#3
diehardrider KEEP IT PINNED Join Date: Feb 2001 Location: Hanford ,CA Posts: 111	what about headers for a 4wd with a big block. What would you guys do to find one that fits?

08-28-2002, 02:48 PM	#5
GMC71k20 Registered User Join Date: Aug 2002 Location: mass Posts: 1,277	I have dynomax cerama-coat headers on my 71 with a 350. they were only a little over 200 and are warrantied for life, even against rust.

08-28-2002, 03:00 PM	#6
diehardrider KEEP IT PINNED Join Date: Feb 2001 Location: Hanford ,CA Posts: 111	thanks for the reply Tank Ill look into those headers. Thats very helpful. My biggest problem is that somone else did the swap. I might be putting a new BB and built 700r4 so i might wait till then and do everything the right way. The way i think i might go is order through Auto zone so i can return the headers and it wont cost me anything and i dont pay for shipping. Then i can try some until i find the ones that need the least modifications.

08-28-2002, 11:25 PM	#8
DaHateTank Registered User Join Date: Aug 2002 Location: Iowa Posts: 119	another thing to do, if you're gonna swap motors, is pull the front clip off. take off the bumper, disco the wiring harness and radiator, undo a few bolts, and two guys can lift it off pretty easy. w/o the front end on it, it was easy to put in the engine, and dink with the headers, etc. -M

08-28-2002, 11:46 PM	#9
diehardrider KEEP IT PINNED Join Date: Feb 2001 Location: Hanford ,CA Posts: 111	id love to pull the front clip but from my last truck i have this fear of not putting things back together. But if i do go for the swap pulling the front clip is something i will do.

08-29-2002, 02:44 PM	#10
GMC71k20 Registered User Join Date: Aug 2002 Location: mass Posts: 1,277	badhabit, they are full length and i had no clearance issues at all. they are coated inside and out. they came with everything you need from exhaust manifold gasket to the collector.



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