Bengoshi said: "So I've found a '72 280SE 4.5 locally that cosmetically, is about a 7 or 8 out of 10 (exterior and interior). Evidently it was in storage for the better part of two decades and the current owner has been bringing it back up to, and has allegedly achieved, daily driver condition."
Sounds like he has found a good car that someone has already sorted. After storage, the fuel delivery system is usually what needs attention. Hopefully it still has original or an equivalent fuel pump. The Djet IS a reliable injection system. Can't see why this thread is suggesting changing that on a car that buyer/seller say is in daily driver condition.
Several owners who tried to convert to things like MS never got them working. Most disappeared without reporting their experience! One on another forum, at least came back, described the problems he had and has since converted everything back to Djet. MS is perhaps an interesting hobby - if you want one
Bengoshi, if you are interested in learning more about the 4.5L Djet, it is an M117. Engine and other system covered in this link:
Model 107 Maintenance Manual Index. M117 4.5 & Misc Information
have useful info. '72 R/C107 and W108 Djets have same engine and other similarities.