Bird72,
Dan built the numbers matching 455 HO for Darrell Davidson's '71 Judge tha basically followed the Pure Stock Drag rules with the exception of a roller cam with roller rockers, so Darrell doesn't have to worry about ZDDP heavy oils. The heads, intake / exhaust manifolds, and 800 cfm Q-jet (7041273) are all factory, no gasket matching or clean-up, 9.5:1 compression with forged rods and pistons, factory crank and dynoed at 475 hp and 575 lbft torque through the manifolds after a little tweaking.
Darrell or Dan can comment further if I got some of the details wrong. It did surprise us with the big numbers. I can't recall the specs on the cam, but, I believe they were around 230/240 @ 0.050" and 0.530" lift ground on a 112 LSA.
This motor made a clean 50 hp and 50 lbft torque more than the pure stock 455 HO's with the 068 HFT cam.
Dennis
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