total timing question

My motor-392 calies kit,big valved cnc 5.7 heads-950 carb with xv intake-had 518hp to rear wheels on dyno mated to a ceramic disc Mcleod clutch and ol' iron 833 trans,car has run 11.0 1/4 and got kicked off the track,We have 32 total right now and was thinking of dropping a little cause i've been reading they don't need so much and when they dynoed it they didnt play much with the timing which sucked but it is what it is--Steve