The replacement lower mounts are great. I would grind off the originals and install weld in the pumashine mounts regardless if the originals are still good. The new metal is thicker. Seeing that out frames are 20 something years old all of our lower motor mounts are ovaled to some degree.
My subframe was cracked and repaired by the previous owner. I also cracked the same repair. Cleaned up the area, welded in a pumashine subframe gusset and it has not given me a problem since. Same goes for the rear fender mount area.
Tony's gusset kits breath life back into out frames. The next best thing to a aftermarket frame is a well guesseted frame.