my right hand side bearing gave up can't get the bearing to fix it went to a crank rebuilder he had another five cranks from nsr's with the same problem.

Can i use an rgv crank? where can i get the bearings from for my 87 nsr/sp.
Saw a complete mc16 engine for sale but it's down on compresion compared to my nsr can i put my barrels and heads on the mc16 engine to regain the sp power.
if so is the timing the same in the pgm box?
i'am a bit down at the moment my nsr was a rocket until it went bang it only had 18k on the clock.