My buddy's 9 to 1 440 with a 484/284 was a mild street driver too- he went 12.80 on the motor and 11.63 on a small bottle at Ashcroft.

WITH 2.76 GEARS!!!!! And 29" tall slicks!
He had power brakes too.

I just wonder what the tuning was like in your cars, toss some specific parts etc at us and let's see if we can figure out where you guys went wrong or not...