Unfortunately build sheets don't indicate the voltage regulators installed in certain cars only battery size and alternator or we could used those as reference points. Autoilite manuals of the period will list what the suggested replacement was not what was originally installed in every application. Those manual;s and such all refer to the same replacement for all sized engines and applications (6 cyl - 429) Just helped reduce the need for multiple ones and reduced inventory/stocking needs. Even in the 1970 Announcement listing of parts
Looking at the 70 buildsheets I have for CJs, they all show "5C" for the alternator on 428CJ cars with and without AC. Also, all with the same sized battery
Some 70 B2 build sheets I have show 4W and some show ZA for the alternator code. On other 70s I see 3B,4G,5A,5C. Do we know for sure what these codes mean?
