Im looking 4239 D engine, for my 1640 tractor.

Today i found M 53 ZB engine, and its from 935 combine, and i cant find any specs for that motor ?

Google cant find anything, so i hope somebody can tell me, what that engine is.

It looks like 4239, but how i can be sure that, engine parts will fit to 4239.

From that engine, what im gonna buy, i need cylinderhead, camshaft, piston and some other little parts...