Do they actually inspect the car for a CA emissions test? Perhaps take it to an 'authorized testing facility' and grease the tech?!? Here in AZ they simply plug into the OBDII port and ensure all the readiness monitors are set and that there are no error codes. Then they connect a hose to the gas cap to check it's function. If all the monitors are set + no error codes + working gas cap = emissions pass. You could be pumping tons of crap out the tail pipe and they don't check or care. Just pay the $17 fee and GTFO. Fee was $27 last time, I was surprised they actually lowered the fee. Two year registration fee for my 2002 car was $35.Got the CEL fixed, but it still won't pass the "visual inspection", or the fact that the 2nd O2 sensor is bypassed, or some other stuff. Kinda gave up on that. I'll just drive it until they either take it from me or make the penalties too significant.
Is that a track day car? It's not so great to daily drive a custom vehicle that is not street legal or safe.I can see this as being an interesting a fun project but given the possible financial cost I wonder if it makes sense vs getting a used EV vehicle? I realize there are a lot of factors in qualifying the value in doing this, many of which only you can answer. The parts you've mentioned alone might be in the $19K -> $26.5K range before having custom integration work done. Is that $5-$10K amount of work?
From a safety perspective I find it difficult to answer how retrofitting electric drive and the large quantity of potential energy into a car not initially designed to manage that environment in a crash situation would leave me concerned.