Whos Running Stock Truck Brakes?

[Bradley S.]

Tod;

I guess I am exaggerating a little.

I have not yet checked the axle ratio but I was told my B1F has one of these:

5.625 56 mph @ 3200 rpm max.

6.285 52 mph @ 3200 rpm max.

6.833 48 mph @ 3200 rpm max.

I used your speed calculator to figure those speeds based on my 6.50 20 tires with a diameter of 34.6 inches. I am betting my truck has the 6.833.

I need to rig a temporary tach so I know what 3200 rpm on a flat head 6 sounds like.