I have a 360 30 over KB pistions 5 out of the hole, around 11.5-1, ported J heads 248-252 @ 50 and 591-610 on the lift, victor 340 intake, TTI headers, and i believe it will make over 500, and its going in a light early A body

1965 Plymouth Barracuda 273 M/SA
1970 Plymouth Duster 360/904 10.60s with J heads