Only 460hp

460 sounds alright. Its what I estimated my 408 put out with a milder cam. It had stock Eddy heads, 10.5:1 compression and a 230 degree Hughes hydraulic roller cam (around 0.500 lift) with 1.5 rockers but I could be out to lunch on that estimate. To me the compression is low for the cam and heads perhaps (what exactly do you have?) What do I know?