I know with the 3.25" spinner there won't be much blade sticking out either side, but I have a 10X8 on my WM Dago Red and it has the same size spinner...and it hauls butt
The 11X7 or 11X7.5 would work well too...maybe a little better than a 10" dia. prop what with the fixed gear on the Revolver...but I guess testing will tell for sure, aye!?