Jesse- I dunno whast wron giwth your car but its something. Are you running 1.7 rockers? that with the B-cam may be too much lift and trying to make power too high for your ehads. you know what that mean.
NEW heads!! Also I think the detonation is definatly because of lack of fuel. Its the only thing I can think of, and lack of fuel can definatly cause taht. Get a fuel pressure reg, and then we gota head out to the track again.
Sky
------------------
-1989 Saleen Mustang #406- TFS Heads, E-303, edelbrock intake,70MM TB, 73mm MAF, off road H, headers and 3chamber flows.
12.55@107mph
Runs on 87 Octane and gets 24mpg!