Looking to fabricate my own engine mounts,have some questions.

The reason the split at 73 is your car body has what are known as "spool" mounts, the 72/ earlier cars had the pillow mounts. I think there is likelyhood Schumaker is done. "I THINK" there was a thread on this some time ago. People "did this" before Transdapt and Schumaker came along.........

There was a thread a few days ago about a motor plate. I never realized until someone pointed it out..........you can mill the thickness of the motor plate off the water pump housing, and avoid the nonsense about pulley spacing.