[flatheadmurre]

I see that they been scuffing but if each bearing individually torqued moves freely but not when all 3 are torqued down i would say size is not the only issue.
At least center torqued spun freely so may want to take center bearing out and torque front and rear to see if they alone moves ok..
Sorry cretin if i sounded harsh just want you to find the issue before starting to grind on bearings...