A quick update for those that are interested in a 4bt swap into a '99 4x4 ex cab.
Got my motor last year and have been tracking down parts for the swap and going through it as I have time. So far I've had to get:

Alternator and bracket (to test run it - could use OEM one from the Dakota I'm told)
Lift pump (old one was cracked)
Dodge Cummins flywheel/pressure plate/clutch/flywheel housing
Dodge Cummins clutch housing
Exhaust flange and V-band for turbo
Dodge Cummins starter
Hoses
Fuel lines
Various bolts/fasteners

Fired it up today bolted to a pallet in the garage - what a neat sound! Still have to plumb water lines to the radiator so I only ran it a few seconds but it was neat to hear! Video as I get time...
Don't know when I'm going to take the Dakota off the road and start the actual swap - still some things to work out on paper before I tear into it and I don't like the idea of being without my truck...
Plan is to use the stock transmission (AX-15) as long as it holds up - it's mostly an over the road truck so I expect it to do fine.
Fire away if you have questions. I'll take lots of pictures.

 

man that sounds like a sweet swap. cant wait to see a vid

 

Im definitely jealous. Maybe ill get a second Dak

 

Its going to be sweet! Only thing im worried about is the ax-15 the 4bt throws out around 300lb of torque. If you are easy on it and dont put any mods on it you should be fine.

 

according to http://www.cumminsdieselspecs.com/4bt.html it makes 265lb tq...

 

I found 355 here.. http://en.wikipedia.org/wiki/Cummins_B_Series_engine

Surely it has to make more than 265. With them being used in bread trucks they had to be slow as hell!!

 

http://www.cumminsdieselspecs.com/4bt.html says 265 there is also a website called www.4btswaps.com

 

That's what happens when you use wiki...

 

wiki is not end all be all. it's all about gearing with those big trucks they put these engines in

 

I thought the 4bt would have more. My truck has 345 lbs tq stock. Sweet swap though man, cant wait to see picks.