ok just broke a motor mount and when i went to remove the head to access the mount bolts 2 of my head bolts were loose. when i tried to tighten them up both had the threads in the block stripped out. been wanting to upgrade any how i have had the truck for about 4 years now what is a good strong up grade motor (not 3.3) i want something that will be a little stronger than the 2.5 and not have to do alot of mods to get it in. any help would be greatly appreciated