Dannes 1970 Oldsmobile 442 with a Chevy 427 L88,the cylinders are 030 over bored so its a 431. The heads are ported and has 2.25 intake and 1,88 exhaust valves comp cams roller cam duration 308 and 0.651 lift. A Weiand team G and a Holley 1050 Dominator