YBNORMEL

Budget heads, Futral fm13, 90/90 intake and longtubes 435/400
Had to upgrade the stock fuel system about 2 months after the install.
The only reason that I went with the 90/90 intake and tb was that I was going to do a 402 at a latter date.

teke184

not bad considering the budge heads...what was the flow??

some high flowing top shelf heads and you'd be pushing the 450rwhp mark

YBNORMEL

Well I just spent the last ten minutes trying to find my flow sheet. No luck. The heads are Absolute Speed Stg. 2 5.3's. I was lucky, one of the last to get the combination before he went out of business.

MadKilla

I am at 472 RWHP now with TFS 215 heads and a somewhat large cam. With true duals, SD tune and another cam I should hit the 500 mark.

AL SS590 M6

Are your TFS heads as cast or ported by TEA?

Kraest

My guess is cast. They are 215cc 13.5 degree heads and have been making consistently 480-500 rwhp on stock bottom-end 346s.

MadKilla

Got them right from TEA. I have a lot of things that would bring the power up. Most guys over 480 are running true duals, mine is through a cat back. I would be over 480 just with that change. I also don't have them milled to 58-59 like most, I am at 61-62cc, I have a bad port job on my lower FAST manifold, and I could go bigger on the cam. Right now I have the stock rear in it and the builders told me the big 500 horse cams would be too large for stock gears.