OM603 head part numbers?
 

I've read that valid OM603 head part numbers for the 1987 W124 are 603-016-xx-01, where 14 is the original number, while 17 and later numbers in the xx field are the "improved" units. I understand heads from one of the 350 engines can also be used, including P/N 603-010-96-20, but may require different prechambers and injectors. Has anyone heard of a 603-010-95-20? Is it also compatible?