Yes. The speedometer reads off the transmission tail shaft, and the speedometer is geared (in a mechanical system) or programmed (in an electronic system) accordingly.
It will affect the speedometer but the tachometer will still be accurate.
Speedometer calibration differs depending on the vehicle and age. Some cars are calibrated by a technician with a computer program. Others require a gear change to drive the speedometer at a different ratio.
If it's old enough to have a mechanical speedometer, it'll be in the speedometer itself. If it has an electronic speedometer, there is no speedometer gear - to recalibrate the speedometer to match something like, say, changing tire size would require changing the parameters in the engine ECM.
The Classic was the FLD132, and no. For one, the speedometer is set according to the gear ratio, tire size, and rear end gear ratio of the truck, and if those vary, the speed won't be accurate.
did you check the speedometer gear in the tranny?
no, the carburetor has nothing to do with your gear ratio.
You could, but you'd have to adjust your speedometer, and you'd also have to change your gear ratio if you wanted to maintain similar performance to what you had already.
You have to change the gears
Yes it does.
Nc 75 ratio of roll change gear
It should bury the speedometer depending on the gear ratio.
It could, or it could make it worse. There are a lot of factors in gear ratio selection.