Great info guys, thanks. I have been pouring through the old topics finding as much info as possible as well. I have seen Donnie Johansen mentioned a few times in regards to cams. WHo does he work for or how do you send him inquiries? Can they regrind on your original cam or do you have to buy a cam blank as i read one of the other guys has done? I don't need much of a cam if any with the blower and as said I won't be twisting it high rpm, so just a bit more lift would be nice which I might can do with some custom rockers. It's a shame it's so much work to get the piston pin a bit higher in the piston, I would love to have a more efficient piston....oh well. Hans