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Fan & Generator Dive pulley nut?
M38A1 Battery 22NF Hold Downs
M38 Tie-rod Clamp Bolts
Lug Nut Stud length...
Tachometer
Zerks, plugs or vents?? DANA 44 Rear end
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Left hand threads on Both rear axle hubs - DANA 44

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willysmjeeps.com :: View topic - J series engine number lookup
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J series engine number lookup
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wesk
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Joined: Apr 04, 2005
Posts: 14321
Location: Wisconsin

PostPosted: Wed Aug 14, 2019 10:30 pm    Post subject: Reply with quote

The water tight version bell only fits the 1952 641087 & later casting blocks. It requires the block with the 10 bolt rear.


The 3rd series of the 641087 block still only had 4 mount bolts for the bell housing.


The 641087 series block introduced under a test run in Jan 52 for 100 engines then finally officially started production in Feb 52. This block was erroneously labeled with casting # 641087 while it's blue print called for a new casting # 804380 but the production correction of the casting # at the engine foundry took place in May/Jun 52.
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45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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