The size being refers to is the outer diameter of the flange.
The crankshaft needs to be in the correct location to get the bearing to roll into place. You only have a few thousands of an inch clearance there. You will need to move the shaft forward or back to get it in the correct place.
The C-221 engines in the 460 used the 3 3/4" flange bearing but I have always been able to used the wider flange one when overhauling them. You may want to check for sure that your block has been machined enough to accept the wider flange. I think all the blocks were machined to be able to use the wider bearing but it doesn't hurt to check. The 560 used the same block and they came with the wider bearing.
This post was edited by Owen Aaland at 15:16:36 02/02/14.
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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