It's a twenty-over, CC solid roller cam, stock crankshaft 351 WINDSOR with a C-4, 4.22 rearend ratio, full interior (with bench seat), slapper bars, 9" slicks, and no NOS or fiberglass except the Ford scoop. Recently I replaced the dated aftermarket cast iron heads (ran a best of 10.91) for some contemporary AFR 205 heads. The heads alone dropped nearly 2/10's off of the ET and added six MPH. It revs so quickly now with the new AFR's, I had to change the gear ratio from the 4.40's to 4.22's to keep the trap RPM down so that the stock crank would live a little longer. 393 in the future