So I ordered the FEP Viton® Fluoroelastomer O-rings. Installed them and...Not so much!
These rings may have some great stats but are not adequate for the rebuild.
I have ordered the same ones as the OP and will be doing it again. Side note the rebuild including pressing out the bearing and seal and replacing them isn't that bad.
Also I ordered the shaft seal from Rocket Seals matched to the OEM seal fairly well and pressed in great and was a great seal around the prop shaft for what I can tell with it all disassembled...