the lil engine that could

I just got a 88 ranger xlt. 2wd 2.3l. It is currently on some 31x10.50 tires. It is a straight pig. I don’t really know what gears it has but I wanted to see if anyone had any gear suggestions. If I get it up to 65 (takes forever) and put it in 5th on cruise control it loses speed lol. I don’t...