Professionally built 383, scat crank,6" rods, dome piston, internally balanced, pro action heads, 202 170 valves, 64cc, champ or kevko pan(don't remember which) 7/16 oller rockers, 6 nights since brand new, never hot, feature winner and a 2nd in imca stock car, hard runner, approx 13 to 13.5 compression, hard runner, 3000 best offer