There are a bunch of things on 30 year old truck that add up - parts wear and replacements get hard to find/expensive - e.g. brakes/camber/caster adjusters wear on knuckles, necessitating replacement. There are some advantages to the "disposable" components on newer trucks - replacements are easier to come by.
Basically, you're doing the opposite of this:
https://www.therangerstation.com/tech/putting-a-1998-ford-ranger-cab-on-a-1993-1997-ford-ranger-frame/
If a regular cab, you would want to shorten the frame 3". Not that big of a deal if you are considering the frame swap in the 1st place. (Drill out the 16 rivets, slide the frame sections together 3" more, bolt up with grade 8 fasteners; use your existing driveshaft - it is 3" shorter).
For a 2wd, especially, if you want to lower, ifs probably beats tib. Lifted and/or 4wd, I'd probably lean towards ttb
One thing to remember - '93+ Rangers are 2" wider - not a lot, but it does push the wheels out - you may/may not like that look. Alternatively, if you are running say Mustang rims, you can run them without spacers and track would be very close to stock.