According to the Standard Catalog of 4x4s, the 83-85 Rangers only came with 4 cyl and 3.45 gears. From 86-93 (the last year the book covers) 4.10 was an option, but it doesn't get specific enough to pair it with any particular engine. The same years (86-93) had three engines available. Some info for you, but no final answer. Also, the book only covers "American" 4x4s, so Mazda is not covered.
I'm curious, what are you planning?