Okay that's sounds good. I've read that the 15 has press in studs and the rods are a problem on the bottom end. Should I be addressing either of these? The thing is my motor has 60000 miles and if I don't need to touch it I wasn't. I thought after reading forums that a cam change might be wise and a performer intake to wake it up a little. Any suggestions. I'm putting at auto overdrive behind it with 342 or 373 gears