I see what you’re saying now. But I don’t think it will matter what starter, since FORD used pretty much the same two starters on every vehicle that had a V8 from 65 to 85 or thereabouts.
Well, not the exact same, but close enough to get you there with two choices. On 164 tooth truck fly wheels, there was one starter for manual transmissions and one for automatics. With 157 tooth flywheels, I think the same starter fit both. Maybe it was the automatic starter? That’s where my knowledge fades out quickly.
Looks to me like you have a car bell housing with 157 tooth flywheel and small clutch. But that’s just a quick visual glance, and has no basis in known in fact
Someone can track down the part number/engineering number and figure out what it was designed for. But if it was a passenger car that wasn’t equipped with a big engine option, it’s probably just a 157 tooth manual transmission bell housing.
Meaning that one of the normal starters should fit. Just buy two starters locally, one for a manual transmission, and one for an automatic, and see which one matches best when you pull the old one out.
The only difference is the amount of reach of the snout and gear.
Now, I might be oversimplifying, and if so, hopefully someone here with more knowledge of the variations can set us straight. There were certain year late model Mustangs that use the same starter whether they had a manual or an automatic transmission. So they had a different flywheel offset.
Perhaps the only difference is 157 teeth? If so, we should be able to extrapolate from there.