Figured I’d revive this thread with some new information on the C4 mirrors. C4 side mirrors actually appear to be nearly identical to Monte/Fiero except the pedestal around an 1/8 of an inch shorter on the Corvette mirrors:
MC
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C4 Corvette
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Note that both of these photos were taken with both mirrors bolted down in the front only, with a MC mirror gasket in place.
The angles don’t seem substantially different either:
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If at all, given I’m taking these photos with a phone camera.
Now here’s the catch:
It’s Corvette stuff so these are rather expensive. This was a local yard- so the prices are likely cheaper than you’d get anywhere else- and the pair ran me $100. If you go into classifieds or eBay, be prepared to spend a good chunk of change; but be sure you’re getting power mirrors, I don’t know if Vettes came with manual ones or not. As a bonus, they’ll likely be heated too!
You will have to put different connectors on the harness though, the ones on these mirrors are too big to fit into the opening on a MC or Elco door.