Hello,
First of all! your jeep stylr was made for more than two years... 1972-1975 are called intermediate! the nose was lengthened to fit the I6 and 304 V8.. I have had one of these and it was a really good rig..
You have a T15 3 speed, Dana 20 transfer, Dana 30 front and a D44 rear with 3:73 gears factory..
These engines are bullet proof and do very well offroad. Hopefully you still have the MC2100 carb on it.. if not! you should find one for it.. mine would run upside down....
33's are about as big as you are going to want on those axles and brakes.. or convert to disc fronts and power brakes!
ENgine wise I put a HEI on mine and it made a huge difference in its attitude. Best 100 bucks you can spend!