Quote:
Originally Posted by Longhorn 70
The LT4 in the Vette in my signature does over 375 at 6150 RPM to the ground on a chassis dino. That calculates out to 450 at the flywheel if you allow 16-17% drivetrain loss.
It has 383 forged bottom with cleaned up LT4 heads, a bit higher lift than the LT4 HotCam, PM HBeam Rods, roller rockers and lifters, extrude honed intake with injectors and computer tuning. It is a bit lumpy on the bottom end but with balancing you really don't feel it.
As this is a 6 speed, what the OP said he was going to use, it does make it more comfortable on the street. Lingenfelter and others build harder running small blocks than I have that work well on the street.
The Muth'a Thump'a cams or similar with E-Force heads are a great start for the top. Forged stroked bottom with proper block prep and assembly will get you close.
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I should dyno my setup. Maybe I am making more power than I thought. My 400 has everything you said but a little more cam and better heads. Its fun but It always feels sluggish after my old standard cab diesel truck that had 700 RWHP tied to a 6spd. Totally differnt animals to drive and give smiles in different ways.