While at a friends house i discovered he has a real LS7 454 that he bought brand new years ago.He took the original iron heads off and put gm racing alluminum heads on. He was planning on drag racing the motor but never did.This motor is 12-1 compression.And has been sitting in a garage for a long time but has never been run. He took out the original LS7 solid cam and replaced it with a bigger one but still has the stock cam.What do i have to do to this motor to run it? I will put a smaller cam in maybe the stock LS7 cam but what compression can i run on premium pump fuel. Keep in mind this car will never be a daily driver.