so i just bought a 1999 1500 4*4 5spd 5.2 off a buddy. he seems to think it has bad valve guides. i haven't dug into it yet. but i think it goes deeper than that the way he drove it. a rancher that i work with just bought an 2001 1500 4*4 5spd 5.2. the first thing he did was swapped in a crate motor. so my question is will the 01 motor swap into the 99 with out any modifications?
Except for the PCM needing to be upgraded as well, and making sure you have the right bell housing for the trans, this will work. It's almost plug and play.
I just swapped a 2001 360 onto my dads 98 that had a 318 in it....didn't need to change anything. If your running your stpcl injectors snd sensors you shouldnt need to do anything to the computer. They used a couple different size injectors through the years and that is the biggest thing to look for.