[JEM]

It's a fair bit of a job, I just did the conversion on my '91 Sub a few months ago.

Might be easiest to grab the entire front doors off a donor if you're planning some paint work, otherwise you've got to drill new mounting holes, patch the old ones, swap the reinforcing plates from a power-mirror truck, etc.

Swapping the door wiring is also a pain, you need to pull the rubber boots out and GM somehow contrived to rivet those things in, so you're in there with a grinder in a flex-head Dremel tool grinding off the rivets.

Then there's swapping the dash wiring harness to get the mirror wiring...