I drive an 86 ranger, 2.9 V6 manual. Its a good truck it just does not have power in my higher gears like 4th and 5th. My lower gears are strong and get up to about 40 to 45 mph just fine but when I put it into 4th to reach up to about 60 it just barely gets there. 5th gear practically does nothing and if there is any sort of hill I will just drop speed quick. a few questions 1. if I were to get a new motor for this truck what is a killer motor I can put into this truck and 2. for now what can I do to get some more boost out of the higher gears?