How to turn over engine for leak down testing and borescope inspection?

After a fruitless archive search, I hope someone is online and can offer suggestions. I’ve got the spark plugs and fuel pump fuse out, and have just completed compression testing.

Now trying to roll over the engine to get each cylinder to BDC, one at a time, so I can do leak down testing and borescope inspection. I have a handy-dandy ¼" square, 2’ long rod of Star Board (the joys of owning a boat, makes it easy to come by or make a plastic rod with which to test).

I’ve found it virtually impossible to rock the car in gear and get the engine to move, even with my sorry old ass and two strapping 20-somethings. Level, paved ground, nothing blocking the wheels. I can’t figure out what’s locking things up, other than friction.

I resorted to trying to bump over the engine with the starter by bumping the key from the “run” to the “start” position, but the starter keeps spinning until I turn the key to the “off” position, not by simply releasing it from the “start” position back to the “run” position. Some sort of ECU-controlled autostart, for lack of a better term.

Is my only option at this point to run the starter between the “off” and “start” positions, bypassing the “run” position? Is there another fuse that I can pull that will kill the autostart, or whatever it’s really called?