Hey guys and gals. Ive got a 99 gmc ext 4*4 1500 with a worn out 5.3 l i use it to pull a 25.5' fifth wheel and it is a little underpowered. i have the oppurtunity to buy a wrecked truck with a 6.0 l and i am wondering what is all involved in this swap. Is it fairly easy or do i have to do alot of changes. Any help on this will be greatly appreciated.