That eCrate is very interesting! Chevy engines became the most popular base for us common-folk auto enthusiasts partly because the Chevy stuff was so readily available; this could endear GM to many of the new generation "wrenchers".
I am coming up on having to make a decision on that burned Bolt and even my EV quest in general. The Bolt comes up for auction next week. It is identified as a "non repairable" vehicle, so I would have to transplant into another car or run it on the street unregistered. Unregistered would not worry me so much as a "toy", but would never be acceptable for my wife to use as a DD. Any Bolts I am seeing as "salvage" are going for $10K or more. Burned one is the only hope I see of getting going on this project for a price I can justify. Frankly, I think it will go for too much, but would sure regret if I see it fetching only $1000 and I miss out on bidding. The big risk is whether the trans and battery are totally destroyed, but I am thinking the fire/heat was up above those two critical components. I can be fairly creative in repairing a damaged trans, but if the motor windings are burnt or the magnets have heated enough to de-magnetize, then I would be screwed. Likewise, I can prune out bad battery cells and re-wire as necessary. I assume all the electronics and wiring are scrap.
The problem with picking a transplant car is that I would want to move back before SRS and ABS, at least, so that means late '80s. And, I would still have to deal with getting it re-registered as an EV. A few years back that was a reasonable process, as Calif. was so intent on encouraging EVs that DIYers were embraced. I'm not confident that the situation is the same now, since we can all just run down to a dealer and buy an EV. Well, all of us rich folk... If I go back before '75, then there is no need for smog inspection, so I could just do the swap and keep existing registration. but that takes me into really old cars. My choice there would probably be a Corvair, but those are getting rare now.
During the last many months I have been experimenting with making my own motor controller; as I think that will be mandatory to get away from the stock BS-ridden PCM/BCM circus. I think making a motor controller is doable, but then handling the PS, PB, and A/C also have to be addressed. PS and PB may not be mandatory in a transplant, depending on how much battery I ended up using; but just the added weight on the suspension might be an issue, regardless if it could be steered and stopped OK. Oh, and I would not attempt regen braking for the foreseeable future. I don't think making a BMS system would be too difficult.
Again, I am at the point where I either have to commit to such a project, or cast it aside and find something else to keep me amused in my old age.