True, but each iteration is out there in numbers - so parts are easy for each one. That, and the commonality is huge through most of those years. Same goes (to a lesser extent, of course) for the Olds 307. I wonder what necessitated the starter motor change for the E-body - kind of surprising that GM couldn't engineer a way around that given the longitudinal mounting of the engine.
T'was the starter. I found an AC Delco reman without the need for a core so I can keep the old one and have it rebuilt if I choose. Went on fairly easily except for the patches of pouring rain moving through the area while I was trying to do the work. Starts much faster too.
Found the reason that GM couldn't engineer the same starter on the E-bodies. According to my 1981 Oldsmobile shop manual, the RWD Y-Vin cars (Olds 307) all have the starter on the right side if you're facing the engine. On the E-bodies, they couldn't put the starter there because..well.. that's where the transmission is. Some of you fellow historians might recall that on the GM E-bodies, though the engine is longitudinal, it is offset slightly to the left (again if you're facing the front of the car). The transmission actually sits below and to the right of the engine. The starter on the E-bodies is on the left side.
In my case at least, I think I prefer the mounting done on the E-body. The RWD Y-Vin cars look like a more difficult job from an access standpoint.
Camino... the number of times the phrase "All - Except Toronado" appears under a schematic in the 1981 Oldsmobile shop manual is staggering. They would have been better off printing a 1981 E/K body manual for the 3 divisions that used this chassis.