My current setup I have been running for the past 5 years is in my signature. It is on a factory 120k mile shortblock, using a power pipe, 90mm sct maf, 60lb injectors etc. I am looking to hit the 500whp next year. I have a fresh 306 motor to go in with forged pistons, a trick flow track heat intake to replace the gt40, and am also looking to bump the boost a bit to get the power to come on a bit sooner. I'm looking to keep the rpms under 6k to help save the stock block. Would a 3.12 suit me best or should I go 3.0? I want to minimize possible belt slip as much as possible. I considered a larger crank pulley but I'm worried it won't clear the water pump pulley and aluminum radiator. What would work best?