Finally got everything installed and a moment to follow up here. With my set up, Univair gear, Univair dual puck brake kit, and Cleveland 40-84 wheels, the 164-03300 rotors worked out perfectly to create clearence between the Aero Classic 8.50s and Caliper.
Attachment 17670
My plane had 3 spacers between the flange on the gear and the torque plate. (Note, I spoke to Univair and the standard set up with double puck brake kit is 2 spacers.) Total thickness 0.30 in. The same as the difference in rotor offset between the 164-01900 and 164-03300
Attachment 17671
Attachment 17672Attachment 17673
I removed all of the spacers and replaced the torque plate to gear bolts with shorter ones. This kept the relationship of the Caliper to rotor, and Caliper Pin engagement the same as it had been on my plane with an additional 0.30in of tire to caliper clearence.
The Rappco rotors are very nice looking and have a nickel plating, so you do not need to paint them. Note that in their application guide the 164-03300 rotor is only specified for the 40-84 wheel. The application is for a PA-25.
Attachment 17675
Attachment 17674
I spoke with ABI about the rotor spacers and they said they were for the 40-65 and 40-70 Cleveland Wheel. They "think it will fit" the 40-84 wheel. Also to get 0.25in of offset you have to stack 2 spacers. So in my case the replacement rotors were a cleaner install, no spacers on the rotor or the torque plate, and cheaper. Do your research and confirm what will work best for your set up, though. No 2 planes are exactly the same.