Hello everyone, My 89' has a GM-454 with the original heads and intake. I've upgraded the ignition and rebuilt the carb already and the thing runs like a champ. Does anyone know who to contact for other performance upgrades? I was looking to put in an oil cooler for sure, but also curious on Intake/Exhaust manifolds. Also, what kind of prop do you recommend for higher speed at lower rpms? I like to barefoot :)