The building block for Kirk's 10-second ride is a GM Performance Parts 502 short-block (PN 10185059). Kirk added a Crane solid roller cam (PN 138511) with 0.595/0.615 lift and 238/246 duration at 0.050. The lobe separation is 112 degrees. Other Crane bits include a double-roller timing chain and roller lifters with vertical link bars. This combo breathes through ported World Products aluminum heads filled with 2.30/1.88 Manley stainless valves, Bill Mitchell 1.550 valvesprings, 10-degree titanium retainers, GM Performance Parts 1.7:1 roller rockers (PN 1236132), and Comp Cams pushrods. The trick valvecovers are GM PN 12371244. On top are a World Products single-plane, oval-port intake and a Bill Mitchell Holley 950-cfm carb. Spark is lit with MSD stuff including a 6AL box and Blaster 3 coil.