Any converting I recommend will still preserve the side art, there are lots of low-medium tack vinyls (souldraw) and you could even put a little release agent over the bosconian art before application so that the other art is held on just by the edges.
I've been thinking of giving souldraw a try for some other art I want anyway...have you used them Le Chuck? Would it be a good option here? I know the quality is not gonna be on the level that you'd normally get side art printed at, but if it looks good, isn't gonna start peeling up on me after a few months, and can be removed later without wrecking the Bosco art underneath, I feel like that's worth consideration.
You can't tell from my pics due to distance and poor lighting, but really, the art on this thing is in decent shape
only considering the age of the cab. Otherwise, it is definitely not in "great" shape, and even calling it "good" would be generous. It's probably average for a 34 year old cab, and maybe I'm being a little picky since it's going in my living room and I want it to look nice...but it's scuffed everywhere, scratched right down to the wood in a few places, the corners on the side art look like someone's tried to peel them, the whites are discolored, the kickplate is really scraped and scuffed (the dark colors do make it not very noticeable though unless you get in close). I'd wager there are some restorers out there who are picky enough and have enough money to burn that they'd want that art replaced anyway.
I also think the idea of building a duplicate just to preserve an already gutted cabinet's scuffed up art is asinine and a waste of money.
Yeah, 100% agree with this. Even if woodworking wasn't a big deal to me, it's pretty tough to justify the time, effort, and $$$ of cloning basically for the sake of side art.
Do what you want, it is yours, and however you'll be happiest with it is the way I'd go. If you've always wanted a Galaga then make yourself a Galaga man. Don't go half way because someone on the internet wants you to do something different. My two cents is that it is easily reversible so why bother not doing it? Whatever you decide, it is a sweet cabinet and I think you're going to enjoy it. Have fun!
Naw, I wouldn't make the decision solely based on what folks on the internet say, but I do genuinely believe that classic cabs should be preserved, and just wanted to get a feel for a) whether people consider this a classic, and b) if there's a non-destructive way to do what I want.
I mean you can't see the Sideart when your playing GALAGA 
I suppose...but by that logic, no one can see the Bosco art when they're playing Bosconian either, so then what's the difference?

WOW! An intact Bosconian cabinet! In my travels of working on dozens of games and many, many Midway cabinets; I have never seen an actual, original Bosconian cabinet. Bosco is one of my favorite games and Bosco as we well know, gets absolutely NO LOVE whatsoever.
See, it's this kind of passion that makes me not want to do anything destructive to the cabinet.

If I ever got a hold of a vertical Midway game, I'd love to sell this to someone who cares about Bosconian and would do it justice.
Personally, I would turn this into a semi-dedicated Bosconian mame and not hack up that control panel. Good luck!
To clarify, there won't be any CP hacking going on regardless what. You can see in the second pic above that the CP had the art stripped off and 4 extra button holes added, and in odd places at that. That CP is trashed as far as I'm concerned, and Midway CPs are easy enough to source that breaking out the bondo and trying to half-ass fix this thing would be silly IMO.