With all due respect to Truckolet, I disagree. I think a 3sp/BW OD will work well for this application. I installed one in my 55.1 3100 which I believe has the same driveline. The only mods were
- change the side cover from the stock 3sp to the new one so the shift linkage would not have to change.
- add wiring to power the OD shift solenoid
These mods are completely reversible should I sell the truck to a purist
The result is that my 60 mph cruise rpm is now 2000, right at the torque peak of the stock 235. It's much more comfortable to drive due to the lowered sound level.
I don't spend much time at 70 due the the stock brakes and my conservative nature, but the truck easily gets there when necessary to pass someone.
regards,
Leon
