No
Dodge 16 inch wheels
700R4
yes it is the same cab all parts will bolt right on
No
The door will fit, but you may have trouble with the window reg, and bolting up the correct mirror.
20 inch wheels are the largest size wheels that will fit into a 1990 Suzuki. A wheel larger than 20 inches will get on the fender well.
125bhp
Could be 3.55 or 4.10
You could find some on Autotrader or Craigslist for about $1500,depending on the condition.
170 hp 260tqe
Mopar ATF+3 or Mopar ATF+4
if the engine is stock it has 160 horsepower