I am considering the possibility of, instead of rebuilding my W115 300D engine, swapping in a non-turbo engine from an early W123 (circa 1980).

Any one done this? Any advice would be appreciated... I am looking to do this as simply as possible... leaving the question of upgrading to the newer glow plugs and a turbo to another time, if at all. (I am told the W123 I am considering still has the old style glow plugs.)

I know there may be differences re: location of the oil filter, A/C units.... what other issues should I be looking at?

Thanks in advance.
Tom