i currently bought a 84 318i for 300 bucks. interior is black and in great condition. the exterior is pretty straight...just waiting for a paint job. The only problem is..that it came with a nasty oil leak...since I'm new to e30s, i hav no idea of what the problem might be. Theres about 215,000 miles on the motor. Should I try to rebuild the motor, or go for an s14 m3 swap, or should i just try to fix the damn oil leak.