Mine street as it runs good on 92 pump. 440/493 stroker with 4.15 crank. Basic EZ heads with mild porting and 10.6 comp with the D-dish pistons and .045 quench. Solid flat tappet 264 & 270 @ .050 with .585 & .592 lift on a 110 LSA in eng at a 106 ICL. 36 total timing and no ping at all on 92 pump. Ron