We have raced 2 times now but we are having distributor problems. The first time we ran in the 9.65 range but the car bogged till about half track. It took me a while but i figured out the car was getting no advance till about 4400 rpms. Tried lighter springs (HEI DIST) but got too much advance and it was erratic. Last weekend i unhooked the vacume advance and bumped the initial timing up to 20 degrees and it ran a 9.23 but still bogs for a good 120 feet or more. Im guessing my cheapo hei is a peice of junk . Im thinkin of ordering a msd streetfire . ive heard these are easier to set the advance curve in.