Posted by Jim Becker on September 09, 2010 at 14:59:20 from (173.57.154.186):
In Reply to: FARMALL A BLOCK posted by 1940km on September 08, 2010 at 18:39:22:
251069R1 is the part number of the earlier Super A block (smaller lower bore). Standard sleeves give a 3" bore (113 CI). Thinner walled replacement sleeves with a 3-1/8 bore would make it 123 ci. Sleeves, along with most other internal parts are either the same or can be exchanged with the A motor (block 6342DH).
The Super C and late Super A had a different block with a larger lower bore.
This all assumes you haven't been preceeded by some wizard that decided to modify things.
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