Thanks for the input guys.
I posted on the Katana World Registry page on Facebook, got some good info, and found the front mounting plates that I need, a guy is sending them to me tomorrow, fingers crossed that they fit.
According to those guys, and what I could see on suzukipartshouse . com, the front engine mounting plates/brackets are unique to the '82 Katana GS1000SZ (USA) and to the '80-82 GS750E. The '83 Katana 1100 and '83 GS1100E plates are different.
P/N: 41910-49200-019
I'll update once I receive the plates and get them installed. Thanks again. -Ed