Balancer slides in on install

What exactly are you saying? Maybe I am misunderstanding, but I am also getting some numbers from elsewhere and I just want to find a decent range that hopefully lands me in the middle. I am also going to measure the inside of the balancer.
Take these numbers given as examples with a grain of salt. The come from different measuring devices with probably questionable calibration (no offense intended). You need a proper size micrometer (not caliper) that discerns down to 0.0001" to accurately determine if your crank is in spec. A bore mic or bore gage would be used on the damper. Might be able to get away with snap gages, if you know how to use them.
The tools and methods used matter. A lot of folks that don't regularly work to thousandth or tenth of thousandth tolerances, don't understand that. Even leaving the mic out in a sunny spot on the workbench can cause enough thermal expansion to boof the reading and screw something up. You don't need a climate controlled clean room, but you do need consistency.
As to your damper, it was designed to be a press fit on this engine. The clamping area provided by the bolt against the small shoulder on the crank is tiny in comparison to the area covered by a proper press fit. It's an expensive risk to take doing it the wrong way.