Ive been down this road..... heres the situation.... with the non turbo motor, i pulled 1500° on the pyro with a 15,000lbs trailer the same egts were obtained when empty... after adding the turbo i never ever went over 900°. Which is perfect. I only got a 10psi of boost and that was all. Any mods done to the pump with the addition to turbo are a ticking time bomb if you plan on using the truck for power as i did. I also had jake brakes which is the long run were the better choice. The turbo only added a tiny tiny bit of low end only noticeable whe bdobtailing. After about year of running about 2500 miles the crank went out, truck had 70,000 miles. Now im not messing around... its getting a new 855 335 or 350, both can be turned up to 400hp. A 10 speed and a new t-case, those sprag deals are junk. Pics will follow up on a new post early spring. The big cam trucks dont have enough hood clearance with intercooler, and the oil pan sump pump hits the front diff. So motor parts will be swapped. The cab and front clip will be raised to accomodate the motor.