[supergonzo]

Yup, you right Rob, Chevy's you can gear to the track better. Because the power is at High Rpm's where the heads flow air like nobody's business. Pontiacs have much more of a street friendly hi-torque type of power band, So tighter converters and more street friendly gears work better.
Rob that car of yours is awesome, BTW...Hope to see you in July

All of this is related to ORIGINAL stroke and crank journal size, of which most Pontiac racers now use a smaller 400 3" main bearing size and aluminum rods which bring the disparity of Rev-ability much closer.