A little more on starter components:
Over the period of 1957 through 1982 there were only 2 starter end frames used on Corvettes----GM #1928966 and GM #1974157. The GM #1928966 was used from 1957 through, at least, 1973. GM says that it was used on Corvette starters through 1977. However, end frame GM #1974157 was released in 1974 and was used in some 1974-1977 Delco-Remy starter applications so I would not be surprised to find it on an original 1974-77 Corvette starter notwithstanding GM information to the contrary. No pre-1974 starter could have originally used the 1974157 end frame, though, because, as I mentioned, it was not released until 1974. The GM #1928966 was discontinued from SERVICE in November, 1979 and replaced by the 1974157.
Over the course of its long life, the GM #1928966 changed in very minor, practically indiscernible, ways. I picture below both a very early example, probably from the mid 50's, to a later example, probably from the later 60's.
However, the GM #1974157 has easily discernible differences. Note the small radiating tunnels as well as significantly different die marks. Any pre-1974 Corvette with a starter end frame configured like this is not correct. Of course, most folks would not notice this; they'd be too concerned about "numbers" to notice.
It's always kind of amused me how many folks get so fascinated with "numbers" (i.e embossed part number and date) on components like starters and alternators. Folks will pay Big $$$$ for starters with numbers like 1107365, 1107352, 1107351, or 1108400. In actuality, one could easily and inexpensively have a starter configured EXACTLY like any of these except for "numbers". In previous posts, I have described how, within each of the 3 series starter drive housings used on 1963-82 Corvettes, there is very little discernible difference. As far as starter frames (the cylindrical part with the stamped numbers and never available separately in SERVICE) go, there are only about 3 or 4 configurations used over the period. As far as the end frames go, there were, basically, only 2 as pictured and described herein.
As I've said many times before, I'm a "configuration guy", not a "numbers guy". "Numbers" are part of configuration but an infinitesimally small part. Of course, part numbers do define a configuration and, in that sense, they are highly important and relevant. But, and for example, in the case of starters and alternators, that configuration can be rather easily and inexpensively duplicated. For example, one could build a starter the exact configuration of any of the aforementioned rare and valuable starters using only a used frame of the correct configuration and, otherwise, all brand new parts. Except for "numbers", no one could discern the difference.
An early GM #1928966:
A later GM #1928966:
A GM #1974157:
Over the period of 1957 through 1982 there were only 2 starter end frames used on Corvettes----GM #1928966 and GM #1974157. The GM #1928966 was used from 1957 through, at least, 1973. GM says that it was used on Corvette starters through 1977. However, end frame GM #1974157 was released in 1974 and was used in some 1974-1977 Delco-Remy starter applications so I would not be surprised to find it on an original 1974-77 Corvette starter notwithstanding GM information to the contrary. No pre-1974 starter could have originally used the 1974157 end frame, though, because, as I mentioned, it was not released until 1974. The GM #1928966 was discontinued from SERVICE in November, 1979 and replaced by the 1974157.
Over the course of its long life, the GM #1928966 changed in very minor, practically indiscernible, ways. I picture below both a very early example, probably from the mid 50's, to a later example, probably from the later 60's.
However, the GM #1974157 has easily discernible differences. Note the small radiating tunnels as well as significantly different die marks. Any pre-1974 Corvette with a starter end frame configured like this is not correct. Of course, most folks would not notice this; they'd be too concerned about "numbers" to notice.
It's always kind of amused me how many folks get so fascinated with "numbers" (i.e embossed part number and date) on components like starters and alternators. Folks will pay Big $$$$ for starters with numbers like 1107365, 1107352, 1107351, or 1108400. In actuality, one could easily and inexpensively have a starter configured EXACTLY like any of these except for "numbers". In previous posts, I have described how, within each of the 3 series starter drive housings used on 1963-82 Corvettes, there is very little discernible difference. As far as starter frames (the cylindrical part with the stamped numbers and never available separately in SERVICE) go, there are only about 3 or 4 configurations used over the period. As far as the end frames go, there were, basically, only 2 as pictured and described herein.
As I've said many times before, I'm a "configuration guy", not a "numbers guy". "Numbers" are part of configuration but an infinitesimally small part. Of course, part numbers do define a configuration and, in that sense, they are highly important and relevant. But, and for example, in the case of starters and alternators, that configuration can be rather easily and inexpensively duplicated. For example, one could build a starter the exact configuration of any of the aforementioned rare and valuable starters using only a used frame of the correct configuration and, otherwise, all brand new parts. Except for "numbers", no one could discern the difference.
An early GM #1928966:
A later GM #1928966:
A GM #1974157: