(Note: I originally posted this to the other thread, but since this one is where the action seems to be, I'll post it here too.)

Welcome! Your car and mine came off the line relatively closely. Mine is 12746, also 10/70 build. Same color as well. Interestingly, my car had a non-turbo 280ZX engine in ti when I got it, complete with the injection and sketchy wiring. The injection on mine has been replaced by carbs, and the wiring replaced. Lots left to do.

I also agree, get the original engine and keep it with the car; even if you do not re-install it just hang on to it.