mine is a 69 440-499 block with a eagle crank eagle H beam rods and srp flat top pistons compression is 12.5-1 with stage VI heads hand ported and M1 single plane matched to the heads, doug herbert solid roller 262-265 @ 50 and 620 lift, 1050 dominator 2" hooker super comps. It seems to run real good if I was doing it again I would go with pump gas. The car weighs 3740 with me in it and runs 10.60's with no tuning. As of long jevity not sure as it has low hours on it still. I have the 440 source steel main caps and arp studs.