I an finishing a 440 build, at least 500 on motor, maybe 150 shot, at least 600 lb/ft, 1969 Dart, will probably end up at about 3,300lbs. Have a Lakewood Scatter shield, 23 spline A833, Dana 60, 4.10 gears with True Track locker.
From what I understand, I can use a 130 or 142 tooth flywheel, but...