I did some additional homework:
The clamshell style mounts are the "new" way of mounting the engine. The Trans-Dapt mount pads are made for the "old" style motor mounts.
With mounts of the same design as seen in my post #2 bolted to the Trans-Dapt adapter plates and with the clamshell mounts installed in the car, it *should* bolt up. I see people are having problems with having the mounts line up correctly, but I guess that's close to unavoidable when "mixing and matching" from all ranges and years..