Case 580ck engine swap help/tips

Hi. New to the site and fairly new to heavy equipment. Bought a backhoe a couple years ago and a few months later it started to knock badly. Stopped running her immediately and after several years of looking I found a replacement engine. Wondering what i should replace on the “new to me “ engine before installing it. Rear main seal? Other gaskets ?...?? Or just install it as is ?? Also should I replace and seals like the converter seal? ( I have a power shuttle unit ) Any help...

Case 580ck engine swap help/tips

Case 580ck engine swap help/tips