Concerning the crank, at the very least you need to polish it. This can be done by a machine shop, or is a do-it-yourself job if you have fine enough emery cloth. This will usually take out any minor imperfections. You should be able to get by with standard size bearings on the mains. In the old days, bearings would come in 0.001" and 0.002" undersize to account for minimal wear.

When measuring the crank journals, did you measure at different locations along the crank length and at different angles? The journal must be round and not oblong.

I sure hope you honed out the #1 cylinder before ordering the rings. From the previous thread pictures, it looked like the #1 piston was unusable and the scoring was substantial enough that it might need reboring. That #1 cylinder looked like the smoking gun to me. Of course all cylinders need to be honed before installing rings.