Wrong Alternator?

67Dart273 said

The square back is a better design, ??? why are you doing this. I don't think the regulator you got is current production, but they are supposed to be a better design........solid state. Make CERTAIN the VR is well grounded.

Then when you get done walk you through voltage drop tests to make sure it won't overcharge

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Hi, I am sure that my car came originally with a round-back alternator, therefore I wanted to keep this style. But honestly, apart from the shape of the housing, I don't know the difference of the internals between square- and round-back.

The VR I bought, is the same style which was already in the car. But when I unpacked it, I noticed how thin the metal is compared to the unit I had. The VR has good ground and seems to work with the new alternator. I also did not want to wait until the old VR goes bad and then figure out that the new VR does not work. So at the moment, I do have two working VR - I like to have one as a backup.

Here the old one: