If you offset grind the 250 crank from 2.100 to 2.0 "you will not get .100 increase in stroke due to the inability of the grinder to keep the journal round. You will end up with an increase of .080 in stroke.
The 2" pin will now accept any rod with a 2.125 housing, 283 , 327 come to mind but they are not centered, although that may not matter. Regardless, the rod length can be compensated by decking the piston or using a piston with a greater compression distance,
