If in doubt spray fogging oil into each cylinder in the fall, then turn the motor over once a month using that box end offset wrench on the crankshaft pulley nut that you can buy from the parts houses. I did that for a few winters when the car was stored off site, and never had a problem.
The battery was out of the car at home on a workbench with a Battery Tender. Never turn the motor over by using the fan,