As i have entered the next phase of my E21 build i am currently looking into putting a completely different rear axle and frame into the car.
Several possiblities exist. The rear frame of the E28 is very easy to fit, but they are hard to get, and if available often expensive. Another option is to splice the E30 rear frame to the E21 frame, but this will have me keep my current rear axles wich are smaller than tiny, and in time will not cope with 170-200hp.
Another possibility often exploited by E30 guys is the E36 compact rear axle setup and frame. On the E30 this is almost a direct fit. On the E21, this could be a possibility.
So i am currently looking into this, and was hoping that a friendly BMWforums chap would have a E36 compact rear axle lying around and could help me with some measurements ?
The measurements i am looking for are the ones on this pic:
Can someone help me with this i will be very grateful