Does anyone have a "recipe" for a 455 with around 400hp or better with a good lopey idle? I have a 455 with a Performer intake and 6X heads..... that is all I know about the internals on this one.
Get Jim Hand's book "How to Build Max-performance Pontiac V8s" published by SA Designs. In the back, there are many "recipes" for performance builds, including a few that match your requirements. No reason to "re-invent the wheel" here.
Both Kaufmann and Butler have levels of "crate" engines on their sites that provide a few items of the "recipe" and the HP levels.
Or give one of them a call. I have heard both provide pretty good customer service on build-up questions.
Especially if you buy a couple parts off of them.
PS: my 455 (462) with off the shelf Edlebrock heads, a Performer intake, roller cam and headers puts out 490 HP and has one heck of a thumping cam lope.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
Last Janary I had the 400 in my bird that was totaled stroked to a 461 w/Butler rotating assembly. Have yet to run it, but look forward to doing so. Stroker kits have become VERY reasonable!
