If your truck is a real dog like mine was, I got a big improvement by changing the cat. I also got a Dynomax cat back from Summit for $150 shipped. I hear they may be less now. It fit perfectly and came with everything. I did them both at the same time but figure the cat was the culprit. It breathes really well now. Before I could not get the rpm's up. Now they increase smoothly and easily. I had a few thousand less miles than you. The 01 may run cleaner than a 95 though. You could try one at a time because the catback bolts right in to a stock converter.
Now it runs better than when I got it at 66k.
95 Ranger Styleside SWB 4X4, 3.0, Auto, 4.10, 145,000 Miles
Century Cap, BF Goodrich All Terrain 30x9.50's, Reese Hitch, K&N Air Filter, Taylor Wires, Splitfire Plugs (I have had good luck with them), Bed Mat, Upgraded to factory alloy rims from "argent wheels", Cat, Dynomax Cat Back, Additional Battery Charging System, Transmission Oil Cooler, Grizzly Grill/ Brush Guard, Hella 500 Amber Fogs, Chrome Diff Cover, Nerf Bars, new bumper.
Upgraded to NH registration from Mass (Best upgrade!)
OEM Tube Rear Bumper, Tow Hooks, 31x10.50's, Larger or Additional Fuel Tank, Locker