Diesel911,
I bought all mounts via ebay or rock for ~$10 ea, so unlikely they were Lemforder (recall some Anchor boxes). I put 2 polyurethane filled ones on my 1984 maybe a year ago, and no noticeable sag since. As I recall, the driver's side one on my 1985 had the bolt head ~1/4" from the frame hole, which might still be OK, but I already had a filled one ready to go and the tire off. Nothing new, people have been filling motor mounts for decades, ever since they started making them w/ cavities. Many use silicone RTV caulk, but I think polyurethane is more rugged and sticks better. The factory design is probably best for impressing potential customers on test drives, but not for longevity.

yuke,
Best to buy a set of metric allen key sockets. I doubt there is room for a hex head and socket. The outer top bolt is fairly easy w/ a U-joint and a long 3/8" extension (mine is 24" L). I got the inner bolt out the same way, but re-installing had to use an allen wrench w/ wobble end. That was driver's side. Last time I did passenger side, I had the engine bracket off for a weld repair, so was easy to get the bolts in. Leave loose until the engine is resting on the mount.