dude, the SR5 isn't the GT-S. you're going to need the entire drivetrain out of a GT-S in order to do what i think you wanna do. you'll need the trans, the rear end (preferrably with the factory LSD). the 4AGZ-E conversion is also not quite as easy as people make it seem. the 4AGE does well with dual DCOE sidedraft carbs. high revs (sustainable) and all! yeah, talk to bill strong. he's the bomb. also check www.club4AG.com