1972 C10 long bed beater with a 4.8 LSx swap
 

Oops, accidentally put my build thread title here and my question in the build thread board.

So, I'm trying to fit a 4.8 into my '72 C10. Using the mounts that set the engine forward 3", what appear to be six cylinder engine stands, and the cross member redrilled to move the engine stands back about 3" to put the engine in the stock location.

The 4.8 truck manifolds don't fit too well:

http://www.diyautotune.com/tech_arti...frame_rail.jpg

They hit the engine stands (right now the motor is resting in the engine compartment, but the stands are pushed so far apart they don't reach down to the crossmember) and exit too close to the frame rails. So, I need some sort of manifolds or headers that give a lot of clearance between the first and second cylinders on each side. The Doug Thornley headers look like they'd work, but are on the pricey side. I've seen a few similar swaps where someone tried Trailblazer SS manifolds, and they didn't work. Fifth generation Camaro manifolds look like a possibility. But then I found these:

BBK LS3 / L99 shorty headers

http://www.bbkperformance.com/produc...aders-398x.jpg

Looks like it might work - and would be a bit easier to hammer a bit of extra clearance into if they didn't, compared to an iron manifold. Anybody tried these, or other fifth generation Camaro headers, in a '67-'72 C10? Especially with the mounts far back on the block like mine and six cylinder engine stands.

Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

I used the trailblazer ss manifolds
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Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

Same, and with the 6cylinder stands and the engine that far forward, they will be one of your only options. The Dough Thorley header also fits but its much more expensive, though very very nice.

Some have also gotten the tubular fbody manifolds to fit, sometimes with modification. The new Camaro manifolds have also been used in a few configurations.

Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

Any pictures of how they fit? I've seen a couple pictures showing the TBSS manifolds hitting the six cylinder mounts, or coming so close you have to hack them up:

http://67-72chevytrucks.com/vboard/s...67&postcount=3

http://67-72chevytrucks.com/vboard/s...d.php?t=447751

Like the guy in that thread, the engine isn't very far forward - it's the mounts that are moved far backward. Mostly to clear the A/C compressor.

Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

Can't wait to see this truck running megasquirt ;)

Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

I used the TBSS exhaust manifolds, and couldn't get them to clear the "humps" on the original perches. So I wound up using a set of 73+ perches.

Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

Ill load me tomorrow but the tb ss manifold cleared perfect on my 71 with dirty dingo silder mounts with the oringal perches
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Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

It looks as if my reputation has preceded me here. :mm: It's going to be running MS3.

Re: 1972 C10 long bed beater with a 4.8 LSx swap
 

Well anyone who has spent as much as much with DIYAutoTune as my brother and I have, knows the name Matt Cramer. :lol: