Hello, first time on the site...just recently purchased a wrecked o4 Cobra with 35k. Someone had put after-market pulleys on from BilletFlow, than started to remove before I got the car. Is there anyway to determine what size S/C pulley might have been on the car, belt is Gatorback 4080772. Looks like the crank pulley is alum. and about 8 3/8' dia. (is that stock)? I went to BilletFlow's site and they have some really nice stuff, lots of info as well. Would the computer have been reprogrammed...could is tell me:shrug:? Thanks for the info, Eric