There are two ways to get usable range out of an EV: either make it super aerodynamic or put in obscene amount of batteries. Almost every manufacturer goes with the former option, with varying success, which is a big part of why EVs tend to be so ugly and why EV pickups are so bad at being usable as trucks (hauling, towing, using the bed, etc).

There’s no such thing as an aerodynamic RV, so your only solution would be to put in huge amounts of battery packs. So many battery packs that not only will it end up costing as much as a new RV, but you will very quickly run into other major problems, like packaging and charging issues that hobbyist-level projects don’t bother to tackle. To get any kind of practicality you need it to be capable of DC fast charging, ideally cutting-edge DC fast charging, which means you basically need to take the drivetrain from an existing EV that already has all those problems solved.

Basically from what I know about EVs the only way to make this even remotely usable would be to do a Silverado EV swap, specifically the one with the maximum range battery, which is like $70,000 for the base work truck spec. Not only is it the only EV with a battery big enough to overcome aerodynamics and make the vehicle actually usable for truck stuff even on long distance trips, it also has a sort of hybrid battery architecture, where it runs on a 400v architecture for normal driving but switches to work as 800v architecture for charging. With a battery that huge this type of system is an absolute necessity if you want a vehicle that can do road trips, because if it’s stuck in 400v mode charge stops will be way longer and add several hours total to the trip. Also the one bright side of such a swap is that most of these RVs tended to carry a gas generator to power things like air conditioning and appliances when the RV is parked off-grid, but basically every EV pickup has a mode that can output 120v AC that can power a whole house for days, so at least that aspect would be beneficial for an EV RV swap.

Project car EV conversions tend to be either a “proof of concept” fun car with a small battery and weak motors, just to cruise around on weekends or take to car shows, or full drivetrain swaps that rely on the donor car’s engineering to make a truly usable and reliable EV. I’m not saying it doesn’t exist, but very few people doing total ground-up EV conversions care about things like range or fast charging, which are very complicated, so nobody has done the groundwork. And I am pretty sure nobody has bothered to engineer the kind of 400v/800v mode switching necessary for usable fast charging.

The other issue, like some have pointed out, is that this is the wrong platform. The Toronado-based front wheel drive setup is unique enough to preserve, and the whole structure of the RV is designed and optimized around that power plant. Maybe if you could find one without a drivetrain it would be better than letting it rot away, but the more important issue is that it is so space optimized for a front wheel drive power plant that there’s probably nowhere to put the battery, and we’re talking about a massive battery that’s one big huge piece, not cells that could be repackaged and hidden wherever needed.

And of course the last big problem is that a total drivetrain swap basically requires taking everything out of the donor car, to trick the computer and motors and batteries into thinking that the original car is still intact. I don’t know enough about the Silverado platform to know how much of a problem that would cause, but most modern cars really don’t like being taken apart so it’s likely going to be a headache.

Long story short it’s not impossible, but if you want anything more than a novelty that can only drive half way across town it’s likely to be one of the most complicated EV swaps ever done and almost certainly the most expensive one ever done.