Well, if SA, I'd be prepared for all sorts of shennanigans and backyard fixes. You might get lucky, but I'd just expect it and most likely a rebuild soon. (yes I know I'm all sunshine and positivity here)
A 14B is ~98hp/ 177 tq. A little more than a 3B. It's direct injected so it will respond well to a turbo. Same bore 102mm, little longer stroke than a 3B/13BT
Not 100% sure, but parts should be OK to find as they were around until 2001 I believe, found in Hino, Daihatsu and the Bandierante as well until 2001 so you should be able to find a lot for it, plus all the conversion pieces.
As for power, I can't really comment as I have a 13BT. BUT, if you turbo that 14B, it will be very similar. it pushes my 4600lb BJ74 along just fine down the highway with passing power at 65mph.