I have an 1984 ranger with a 2.3 l with only 30,000 miles since the rebuild and now the tranny is starting to go out. I have really been wanting to switch motors to a extended cab or a Bronco II. Not really sure if that is a possible swap I really use the space a for hauling the kids around. any advice would be great.
I don't see any reason why that wouldn't be possible...the 2.3 has always been an available motor in the Ranger. Your mounts and such should be a straight bolt-in right up to 1992. After that they changed the body style and I believe the frame was redesigned, though your motor would still work. My sister has a '93 with a 2.3 in it, though it's EFI rather than carbed.
As I recall the extended cab option was available on the Ranger beginning in '86.
Probably not too common in a BII but since the front is the same as a Ranger it should be a bolt-in swap. Might be a bit sluggish though due to the extra weight. Your current truck should weigh in at around 2800 lbs. while the extended cab comes in at about 3100 and the BII is almost 3400. You could shave that some if you can find a fairly rare 2WD BII if 4WD isn't important to you, or you could possibly convert a BII to 2wd using Ranger components.