I spent about 3 hours today talking to bmw specialist's including bill arnold's bmw repair in ca which is like one of the worlds most famous bmw shops and he told me all I need to do is strip the 97 m3 motor down and use all that I can from my current motor and change the eprom and I'm set. I have to change it to a 95 m3 chip or after market chip and it'll work fine. don't need any ews, wiring harness or intake manifold or ecu. this just got a lot easier...
hardest thing is going to be closing up the old o2 sensors holes
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