The mirrors are huge. I like them, my buddy thinks they look way to big.
You could go with the largest chevy non dual arm mirror and it may work nicely, too, but I really wanted the two piece glass system. Either way, none of them seem to fit.
Skip, it appears none of the chevy dual arm truck mirrors fit, so I found the best deal I could on ebay and went for it. Made them fit.
Mike, the side to side glass adjustment power is easy enough to wire up. The heat, I didn't bother with, but may end up wiring to my defroster.
I did the reindexed torsion keys and ball joint relocation too.

After 6 years, it feels like a new van again. (My hands aren't working very well any more-I can hardly drink a cup of coffee- so my awesome brother in law did the vast majority of the work.)
Leaving for Owyhee again tomorrow, pics to follow.