LIL SS

iTrader: (9)

Any off the shelf 2" headers for trucks? I tried fitting the kooks f-body ones in my 63 and they don't fit.

AKlowriderZ71

iTrader: (22)

None that I know of. What headers are you using now, size & manufacturer?

ZR1 DREAMING

iTrader: (28)

For your '63? Do you have anybody close with a set of GTO headers to try? They seem to be closer for our truck than Fbody ones but still not the answer, maybe you'll have more luck.

LIL SS

iTrader: (9)

Here is the deal. I habe a 63 Chevy Pick up with a 418ci LS in it. It made 521rwhp / 469ftlbs NA through a locked up 80E with:

11.1cr (72cc AFR 225's, -4cc piston, .045" gasket)
245/260 106icl 109lsa .646/.629 custom grind
Super Victor intake
NX 2 stage plate
4150 to dominator adapter
Dominator TB
EWP
UD Pulley
Edelbrock 1 3/4 stepped to 1 7/8 with a 3 1/2" high velocity collector for 4th Gen F-bod's


I think I might have been leaving power on the table with the headers both NA and most likely worse yet on the bottle.


I recently sold the heads to a buddy and went with a set of PRC 237's. With a 58cc chamber and a .051 gasket I am at about 12.9cr. I also put a new bumpstick in it 254/260 111icl 113lsa .630/.625. I am planing on running E85 now.

I am guessing that with the added volume of fuel for the E85 that I am probably leaving even more power on the table by leaving burnt gasses in the chamber. Add N20 to it and probably makes it worse. The plan is to use the 2 stage kit, first stage at 150, second at 150 moving to 250 at some point (300-400 total). All of this will be with E85.

I tried fitting a set of Kooks 2" primary with 3 1/2" collectors in the truck and both of the collectors kick out too far and hit the frame.

I tried a set of 1 7/8 Kooks headers for a TBSS as I have seen another guy use them with sucess in an older truck. The header would fit the truck fine, but the front primary tube makes a drastic bend and does not fir the PRC 6 bolt head. It passes right through where the 2nd and 3rd ear are located. Sure I could cut them off since I am running a LS3 block, but I feel that would be a waste if I ever wanted to sell the heads or go to an aftermarket block.

Being that I run a motor/mid plate I need something that drops decently quick after the last cyl's and fits the 6 bolt head and truck frame.


So this brings me back to running the Edelbrock for now until I can find something.


After my long story here, I am curious to know is anyone is making upwards of 800rwhp through a 1 3/4 stepped header?

Any other suggestions on headers to try? Might try to get a hold of some GTO Headers. Kooks said CTS-V's might fit as well.

ZR1 DREAMING

iTrader: (28)

Have you thought about soliciting out to some of the guys that make their own headers? I'd agree that especially on the spray you'd want at least 1 7/8 primaries considering you're set-up. I've spoken to a guy that made his own for his BMW LS1 swap project, routed them so they're all equal length, meticulous and superb welds, he kept all the measurements and would replicate a set if I pursue that route for mine. Maybe if you threw that out there to a few places you'd find some better luck? His price was very reasonable as well, gotta assume somebody near you can do the same.

LIL SS

iTrader: (9)

Lemons is with in 2 hours of me but $1,800+ for a set of mild steel that still needs to be coated is a little spendy for me.

There are a couple of other guys but I know one wants $90 an hour, and the other is 300+ miles away.

This is why I am trying to find a set of off the shelf headers that fit.

Another idea would be to cut out the 1 3/4 n section on my edelbrocks and replace it with 1 7/8.

TXsilverado

iTrader: (19)

the 3.5" collector kooks that i had touched the frame. i ran my exhaust through an x pipe. before welding up the X i sinched the collectors in using a wratchet strap. after welding up the X we let the strap loose and the collectors missed the frame.

LIL SS

iTrader: (9)

They hit so bad that I could not even get them close to bolting up to the head.