Bellhousing runout '65 273

Thank you all, learned something new today. My dial indicator mount is a magnetic type, was thinking I would stick it on the flywheel like the FSM states. I can't find the thickness specs for the flywheel in the FSM, but I have two good used stock 122 tooth flywheels here, one measures .895" and the other .879". Planned on using the thicker one, but both look very good. Anybody know the thickness spec?