Me too that mav would have been a fun little ride ..anyway here is an update on the BMW i removed the mustang engine ,tranny and ECU along with the wiring harness( what a pain that was)..I also removed the motor and tranny from the E36 That i took to a salvage yard and got 50 buck for so my E36 only cost me $250 total ..I removed the front sheet metal to aid in motor installation..
My $250 92 E36

stock interior

Empty bay

The new power plant