I was running 10.1s with the engine thats going into my Rampage now... was in the race car as my back up engine... its a 10.6:1 with iron W-2s home ported.. .640/.640 roller, home made headers... back then it was a stock stroke with 4.88 gears and 31" tire... now its a 3.79 stroke and runs 9.50s in the same car