Thanks for all the input everyone. I found IND's website, will be giving them a call.
I have already spoken to several people at Dinan in length about this, they did all the research, installing the M3 engine and suspension parts is no problem, I can retain the AWD xDrive, and it can handle the M3 power with some to spare.
They did mention that it would be a bit of a challenge to integrate/program the M3's computer to work with the xDrive system, but they assured me it could be done.
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