I agree on the power these eng will make, my new R3 engine is insane. my last 360 build had 400 hp to rear tires and it was fast, I even let a selected few test drive it, but with this R3 and probably 650 to rear tires ( no dyno # ) I would never let any one drive it. 71 Valiant 416 Indy 230 fully ported, 4 spd 833 face plated 4.88s w/ 29.5 M/T dot drag I only made a few passes with it this year but it ran a 9.99 @ 133.8 mph on slicks and there is definitely more in it yet. I think I will get closer to 9.7s before I put the Nos to it.