As long as you are going to be pulling your engine, port your exhaust manifolds. If you are not sure how to do them correctly (you can actually reduce their flow capabilty by porting them incorrectly), have someone that is familiar with the process do it for you. You could even take it to a shop that specializes in high performance headwork, and they should be able to port them correctly. Member AJsGarage(Las Vegas) does them on a limited basis , so you may want to contact him. The porting allows the turbos to spool sooner and give you more midrange HP and Tq. Take care, Mark
