To remove the pressed-in RH (Blind) main bearing, I have scored & cut through the bearing with a Sawzall metal blade being careful not cutting into the bearing housing.
I sent my rods to Paul's Rod & Bearing (Russ Schworer 816-587-4747) for rebabbitting.
For the mains, I ordered new press in bearings from Sharp's Antique Tractor Works In MO.
I then had my local auto machine shop turn the crank main & rod journals then machine the rod & main bearings to 0.002" > the machined crank rod/main journal dimensions....It's a little tricky with the right hand bearing being blind...
Hope this helps.....Good Luck!