I would have to sit down and do the vector diagrams but I think the additional vector of pulling G and the resultant change in AoA percieved by the prop would be more than you have described. Its more to do with the rate of turn than anything else and there will be a cosec in there somewhere which will be loosely linked to you increased stall speed pulling G.
Because the prop aerofoil is 90 degs out of plane to the wing aero foil, my gut feel is that this would cause it to have a reduced stall speed.
Tis quite interesting mental problem though.
Genghis and India Mike can you helpout please?