Try the Minnesota Street Rod Assn. http://www.msra.com/MainPage.htm
They know just about everything going on in MN regarding hot rodding. You might find some good info in their "Line Chaser" newsletter.
I'm not sure how close you would get to this shop but I've heard good things about them. Choppers Rods and Customs, 12526 319th Ave. NW, Princeton, MN 55371 (763-389-3060).