They should be abe to strip and prep. them for chrome. I'm doing the same thing with a set for my '73.
I bought a set that was still in original paint, faded/peeling. Only issue may be what was done when they prepped them and primed, any filler used to fil pits/scratches?
A good chrome shop will have to spend quite a bit of time on them regardless, filling in any pits/scratches with metal before they can copper plate prior to chrome. Everything has to be perfect before chrome, otherwise it will show through when done. There was a good article in Mopar Muscle(I think) about chrome restoration that would probaly help you, I'll try and find it when I get back to the MH.
I would think to do the job right you'd be looking at closer to $150-$200 each for chrome.
I haven't priced doing mine yet. And yes you can gut the housing and replace the glass.
I'd find a set that hadn't been prepped already (for paint), easier to see what needs done to them. :dontknow: