Racer Brown st-21. .520 lift and 254 at .050 I have used this in street cars alot. It will idle at 900rpm all day long and make excellent power. I had a street motor KB hyper piston 360 sitting and the need came up for an engine in the racecar. I put it in the Demon and went 10.60s. Had the st-21 cam in it. Also had that cam in a low comp [8to1] 318 in the Demon and it ran 11.70s. Racer Brown phone #410-866-7660