The 240 is indeed the 123 body, while the 220 is 115. Their engines are different models (615 in the 220; 616 in the 240). I'm looking for someone who might have experienced installing the later model engine from a 240 in a 220.

I ask because I have a '73 220D with a frozen engine (PO was a clueless lady). I have access to several engines from 240Ds that don't cost much. I'd like to find a used engine to hold me over 'til I can build a fresh engine for the beast.

So, if putting a 240D engine into the 220D has been done, and someone can tell me what it took to make it happen, I will be most grateful.

Thanks!