I am building a 94 cobra which will be used mostly for shows and street driving. We want to do 165 AFR's/ E-303 for a nasty idle and put a powerdyne ( with FRPP label on it so it looks a little more "Fordish". My question is that i hear about powerdyne belts braking if spun too high. Option #1: 165's with the 61cc ( which gives 9.3-1 comp) chambers and a #9 lb pulley or #2 165's with the 58cc chambers ( which gives 9.6-1) with the #6lb pulley. I just wondered if I ran a little more compression the motor would be a little stronger before getting into boost and then I wouldn't have the make as much boost and spin the blower as fast. Most guys with heads and cam say they are only seeing #4lbs with the#6 pulley and 6# with the 9# pulley. Which way would be best. I have to be careful because I am running a stock shortblock 94 with hyper pistons. Don't want a meltdown. What do you recommend?