Glad to contribute, these days I've been selling my two cents worth at half price! PS an old hemi or a new hemi? I keep dreaming that my '57 Chebbie needs a hemi in it should you trip over any old 392's at an affordable price. Oh yeah, the 427 I mentioned was in a '72 Nova, ran low to mid 11's and was a super consistent bracket car for a couple seasons, the 427 did just a touch over 500 horse on the dyno (engine dyno) and was hooked to a Doug Nash 5 speed with a 9" rear if that helps you with any kind of base to guesstimate the horsepressure on your 454.