Cummins Swap?
 

I'm hoping this is the right thread to post in but...
I'm looking for a 4bt, to swap into my 2005 Ford Ranger, looking for do's and don'ts about it.
Has anyone here put a 4bt into their ranger? Or a 5.9 HO if it can fit without extending frame.
Any input would be very appreciated. Thanks!

Yes, 4bt swap into Rangers has been done quite a few times.

This forum has general info on 4bt swaps(and 5.9l): Cummins 4BT & Diesel Conversions Forums

And here for a Ranger swap: 4BT full width Ranger