im planning on building a motor for my 4runner, i have a motor all apart at the moment. I got the rods and pistons out, it needs new rod bearings, what im wondering is in the manual it says they come with ethier a, A, B or C. Mine is stamped B on all four, where do i get size B bearings all i see is STD and undersized ones. i couldent find much info on the "letter sizes".
thanks for any help.

 

FSM page EG1-52, botttom of the page has the chart.

Size: Big end inner diameter: Crank pin diameter: Bearing center wall thickness:
A: 56.000 - 56.006: 52.988 - 53.000: 1.484 - 1.488
B: 56.006 - 56.012: 52.988 - 53.000: 1.488 - 1.492
C: 56.012 - 56.018: 52.988 - 53.000: 1.492 - 1.496
U/S 0.25: 56.000 - 56.018: 52.701 - 52.711: 1.626 - 1.636