Wanted Cummins 4bt (1 Viewer)

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Are you anti 6BT? They are much more refined and often cheaper/easier to find. Unless it’s going in a 40 which then probably won’t fit.
 
Couple on Kansas City Craigslist, one complete and another apart. Another person had the transmission adapter to 4 speed. Very seriously thought about installing this in my 40.

cummins 4bt 3.9l diesel engine
 
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Looking for a 4bt for my cruiser. Does anyone have one or know a good source for getting one?
Thanks

Curious your thought process - I eventually want to do a 4bt or 6bt swap and and curious your reason for going 4bt vs 6bt. Is there as good place to find comparisons and breakdowns of this?

Thanks and sorry for the question - relatively new here.
 

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