I have posted a similar question. I am interested in Rory428 and Rouge Wulffe opinions. I own a 86 ranger but have a 88 carb 2.3 with a m5r1 5 speed the gears in it are 3.45. Problem is at 45mph it revs 2200rpms or more in 5th. The lower gears in the m5r1 are very close ratios so I'm thinking I could loose some low end torque to drop my overdrive rpms. The next highest ratio would be 3.08. Is it your opinions that it would turn it in to a zero torque truck in 5th?