finding a diesel

[creamsicle68]

hey guys, i was thinkin about tryin to sell my one truck but the more i think about it the more i relize im not gonna be able to get my money out of it. so if i decided to keep it i wanted to look into putting a deisel in it. would it be better for my to go find a whole donor truck? or is there places that i could easily find an older diesel from another squarebody to put it there. the truck wa son fire to rewire most of the truck anyway. just havent ventured into the diesel world to much and was curious if there was an easy way to locate them.