A big of historical information on these things, from the Chevy realm of things.
The "big news" was that when a motor mount failed on a later '60s Chevy car, before they started to use throttle cables, when the lh mount might fail under acceleration (as in moving away from a stop sign), the throttle linkage could bind and cause problems. Hence, their "Motor Mount Restraint Kit", which was a factory recall situation for many later '60s cars and pickup trucks. We got it installed on our '69 350 V-8 pickup. In that kit, it was a new mounting bracket and the new inter-locking motor mounts, which were put into regular production after about 1970.
In the 1980s, I bought some obsolete parts from a Chevy dealer near me. In that "stash" was about 40 boxes of the GM Recall "cable kits". I laughed when I saw them. But it was even more amusing when I took some to the Pate Swap meet and a guy with a restoration parts business started drooling over them! It was "Eureka Moment" for him, his eyes got bigger when I told him I had more. LOL Later that night, he came to my shadetree shop and filled the trunk of his rented Mercury Tracer with all of the remaining boxes of the cable kits. He laughed, to his frined, that if his father had told him he'd be doing this, he would have called him "Crazy". Yet, here he was doing it. He got his "treasure trove" and I got some $$$$. All was good.
When the lh front mount degraded on our '66 Newport, the top of the a/c line from the compressor would touch the inner hood structure. I got some stiff electrical wire and made my own "restraint" vis the power steering bracket and nearby stub frame rail. That, plus a bit of restraint, worked until I could come home from college and get a new mount installed.
GM/Chevy tended to get all of the publicity for the engine mount issues, even some lawsuits, as I recall. Many manufacturers put new "fail-safe" mounts into production as a result, with little fanfare, to replace the earlier-design mounts.
By comparison, the Chevy recall kits were much more substantial.
Enjoy!
CBODY67