51 b in 42 b block swap

Anonymous-0

Well-known Member
Hey was wondering if anyone else has put a 1951 block in a 1942 john deere b. I happended to have a 51 block with .045 over gas pistons and my 42 B i ripped into has 5 cracks in the block one in every pushrod tube and one between the bores, and it has the all fuel pistons. I already did a decent amount of grinding on the 51 block to get it to bolt in place and I am going to drill and tap 4 out of the six holes that were in the other block to put support back in. I can already tell the upper radiator hose will need minor modification. Just wondering if anyone else has done this swap and if I am missing anything? Thanks Zach
 
Buddy wellded new ears on a #3 Power block, drilled and tapped the main case on a '47 A popped it in, runs fine!
 
I know of a puller that has a late B power block stuck into an earlier B like that.Not easy but can be done and not look too bad.
 

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