ok here we go, i drive a k2500 7.4l and today, somehow, my wife was driving it to town and she calls me saying the engine is smoking and there was a loud band. so go out to where she is and low and behold there is a whole in the side of the block, she blew a piston right out the fing bottom. how i do not know she said she was driving like she always does which means hard cause her little cougar has had 2 engine swaps already. anyways now i come to my question the 7.4 had alot of power but it drank gas like it was nothing, what i am wondering is can i swap it out for a diesel? and if so what do i need to do? i know where i can get the 6.5 diesel and i know i will need a new exhaust system but what else might i need? and is there anyother diesel engines that will fit?