id suggest, keep it original, this restore will take a lot of your time and well earned money so spend it wisely. be especially careful with the gear box install and the electronics. Finding an original dash for this chick will be one of the most difficult tasks, so try restoring the old one, its fitting will be much better than a brand new one. Be cautious once getting the suspension installed, E30's were best known for their performance on the road and even without traction control these cars where beasts on turns at high speed because of their amazing suspension. Try getting an original kit. Are you putting in a new engine or restoring the old one?