Hope you find a solution soon! BTW some E30 M3 info:
About 18000+ were built
4996 > USA/ 304 > Canada
US: about 34.000$ and not introduced until 87 as an 88
S14 (2302cc) engine, to 192 hp (300 racing) and 170 ft-lbs @ 4750
US axle: 4.10:1 / Euro: 3.25:1

- Bimmer mag