I think the oil pan is different as is the drive hub. The pto should fit ok, but I would double check the crankshaft length. Essentially the blocks are the same, but some swapping might need to be done to make it work. Does he have the original engine from the 149? I fit a k341 from a wheel horse into my 1211, but had to swap out the oil pan from the original M12 to the K341 to make it fit. good luck
Jeff (teet)
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CCC 1211
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1962 Original
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