It is doubtful you will find a chip for it, you can do a search online, I did that for an 86 2.9 and a 92 4.0 without any luck, but that is about the best I can think of.
As far as the performance difference between the Mazda and the Ranger, I would really be surprised if the Ranger would have performed liked the Mazda when it was new. The older Ford 2.3's weren't supposed to be hot rods.
You might check into a newer 2.3, so i read they are putting out about hte same HP as the old 2.9 V6 that was also offered in the 88 Rangers and much more refined. Try the 4 Cylinder Tech page and check out some of the stuff those guys are talking about.
White 2002 Ranger XLT Extended Cab 4.0 4x4 4.10 LS
K&N CAI 77-2529KP
2 1/4" Exhaust
Explorer Dome Light
IN THE WORKS:
Sable Electric Fan
“If you do not know where you are going, every road will get you nowhere.”