headers

[swey00]

Do the tbss headers(not stock manifolds) fit on a 4wd 72 blazer? I am putting a ls3 in it, so I would like something that breathes a little better than stock.
thanks

[BR3W CITY]

The headers for a TBSS are fairly large, and the angle which they exit the engine bay wouldn't work based on my experience. The biggest problems with clearance in these swaps is the slope, or how far "down" they go before they head "out".

The reason the TBSS stock manifolds work is that the log-style design means you don't have the girth of 4 indiviudal primaries, which is what tends to interfere with the motor mounts.

Doug Thorley has swap headers for most of your applications. They are $$ but one of the only made-to-fit options.

[swey00]

Well, I have read several different people on here have used the headers also. Problem is, I'm pretty sure they were all 2wd. Just wondering if anyone had any experience with them and 4wd.

With the Doug Thorleys, the ones I would want only come in 1 5/8. That would not be good enough for a cammed ls3(and possibly FI later on), so 1 3/4 is at the very least what I would want and thats what the tbss mostly come in.
thanks

[BR3W CITY]

While I can't comment directly on fitting anything into a 4x4 swap, I'm more than comfortable on 2wd swaps, and your working with even less room.

The DT 1-3/4 is the largest header that I've seen anyone run on a swap truck that wasn't a)built from scratch or largely modified from a custom header setup b)over $1200.

There aren't 2" primary headers that will easily fit, and there really aren't a ton of 2" primary headers around in general. We've got multiple 5-7-900+hp cars running 1-3/4 or less...thats single digit cars. 4x 2" pipes is 8" with no room in between, its hard to convey just how much room they take up under hood.

If you wanna go turbo down the road, then cast manifolds are better to easily convert.

Just for sh!ts, open a picture of the TBSS cast manifold and then overlay a picture of the TBSS big-tube headers. The #1 primary will hit the engine stand or the frame rail before it comes "back" far enough to tuck in. You also have the steering shaft clearance to consider. If you use a slider mount, you may be able to offset the engine far enough to come close to tucking that pipe, but it may place the engine in a less-than-ideal location.

[engairuph]

I have a 69 suburban 4wd and exhaust is the biggest thing. I'm looking for something to huge the engine better and so far the Camaro 98-99 seems to be the closest and have a 2 1/2" flange and keeps from grinding on my frame. Don't care for long tube headers since I have a PTO shaft and shift linkage in the way. Fixing to try a LS1 manifold this week to see what happens.

[71chevystep4x4]

Hooker block hugger shorties #2312 $250