Don't sweat it. I have no idea what the actual number would be, but since the 'street' 302's made 400bhp the factor racers were probably up over 600. Just a guess.
By the way, welcome to the boards.
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1997 Mustang GT "The Freak" - 13.80 @ 101.70, 2.07 60'
1995 Honda VFR750 - not much @ really fast (actual data pending.)
1964.5 Mustang 289
Rice Haters Club Member #13