This should be similar,a guy I knew had a 408 that made 540 h.p.,the heads flowed 270,10.1 compression,m1 intake welded up and ported,950 holley h.p.,a custom hydraulic roller and 1 3/4 headers.This thing was actually fairly mild mannered and all done around 5700 rpm,obviously it was done very nice but still a basic overall combo.