I am having a time trying to install the floating bearings. I would like to know the factory inside diameter of the con rod big ends. I think my rods are junk.
Very much appreciated for any help.
You should be able to measure your crank and then mic the thickness of the bearing shells (using a bearing mic or a mic and a round bar on the inside).
Do the math and you'll soon figure out if the bearings are correct for the crank/rods you have. Keep in mind that sometimes the rod bearings are "out of round" a bit and it take some "tuning" with a rubber mallet to get them to correctly fit.
If your rods are out of round, that can also be the issue . . . so they should be checked via a precision rod-bore mic.
Here is a little video I did a few years ago on the subject: