Quote Originally Posted by steveo View Post
its really hard to hurt or blow up a well built smallblock. i wouldn't really stress over it, you just need to make sure your general fueling is between like 11:1 and 15:1 so you don't rinse the rings clean, and the timing at a range so it doesn't go click click boom, then tune from there.
10:1 won't even hurt it at WOT. Better to have it a bit rich than too lean. GM ran alot of truck calibrations in closed loop at WOT.