Thought id introduce myself here as I have been reading up on alot of builds. I recently picked up a 91 lexus with 5.3 tr220 cam borg warner turbo n built th350. After doing some research I see Corey from a member here built the car and was tuned by allen from nelson performance. The cars tuned on 9psi. I however feel the need to step it up for the track and have it retuned for 15psi