Well i installed the kit and had it tuned, ive been more than happy with my kit. About 2 months ago the belt that came with the kit slipped and shredd'd. I bought a Dayco Poly Cog belt and the truck did feel alittle better. Well a week pased and i saw belt residue ontop of the water pump but just blew air on it and kept driving. Today, i punched it and the belt POP'd again...WTF..
It was shred'd too. I orderd a Gaterbelt and wont be here till Wensday. DO i need to pin the crank, buy a shorter belt or buy a heavy duty belt tensioner???

 

Check the crankshaft damper bolt right-away. The same thing happened to me and the damper bolt was almost completely out. If that's it, buy the ARP damper bolt and torque to 250 ft lbs with thread locker.

 

make sure it aligned right too,if the pulleys arn't in line that could cause what your describing as well