As far as i know there are no difference in the engine/trans "donuts" between V8-60 and the bigbrothers and what is available new today is the same for front/rear.
I've never seen the 60 mounts reproduced - no doubt too little call for them.Ok i stand corrected...have never seen anything but the black ordinary ones in the v8-60s i worked on...and no clue if anyone today makes anything else then the std mounts.