Probably not many who frequent the suspension section. PurEvl who posts in the Eastern section had a 408 (I think) iron block with a huge turbo putting down serious power, but I'm not sure what he was using for suspension.
I think his car is for sale, if not sold at this point.
Also, if you ever build that LS1 E36 M3, don't forget to post up how it worked out. That will be very interesting to see
I am fond of BMWs myself and getting rid of my STI for a E46 325 model soon, and I autocross in the Boston BMWCCA local events