[Double Venom]

Mike, you've got it, the correct measurement for the lowers is 15"s center to center! I should have known better than to trust my memory any more escpecially a bout numbers. It sounds like you pinion is going way to high under power this WILL give you a serious case of wheel hop! The pinion, with the car under load and sitting level should point down 2.5 to 3 degrees for our cars. Even with slicks (ya-boy) this will keep the pinion in a torque attitude of being still slightly negative or level. Never have it pointed UP!
DV