Hey Pinder,
You're really making me think after following your posting. I've just finished replacing all the rear bushing on my 66, plus motor mounts (which were really bad) and sway bar bushings today.
I've looked closely at the sub frame bushings over the last several weeks. They are the same bushings that were on the car when we got it 21 years ago. They don't look too bad to me, but looks can be deceiving too. The motor mounts didn't look too bad either, until I got them out. They fell apart in my hands.
Wondering if I should consider changing them out too. I hadn't planned on it, but could sure could, even if it's at a little later date. Can't be much harder than those motor mounts I wouldn't think. That was a tougher job on this car than I had expected.
Regards,
Ed Riefstahl