I know this thread is kind of old, but do you have more details? I recently purchased a 80 320i (US model) and thinking of going with a M42 in the future.
Would like to know what modification or fabrication had to be done to make it fit.
What to use with it; radiator, ECU, wire harness(es)???
Is it a direct bolt on to the stock 5 speed tranny I have?
Any info and other photos would be great.
Thank you

