I am the proud owner of a 1974 Ford F 250. I purchased the truck about 12 months ago. It has about 50,000 miles on it and is in good working order.
The brake light came on the other day, I noticed the master cylinder was low. I added fluid. The light came back on and off.
I looked under the truck and the rear driver side drum has fluid on it.
So I pulled out my 20 ton jack and proceeded to loosen the lug nuts. First off I couldn't find the lug wrench, there is a small jack that is mounted in the engine compartment, but no lug wrench.
So I pulled out my socket set and it sure feels like 13/16 socket. SO I went to Autozone, picked up universal (one side 13/16) wrench.
Back at home I tried loosening the lug nut, no way - it's not budging. No sign of rust, I tried another one - it came loose. Another one and it seems the wrench is too big? Is that possible? The lug nuts all look factory, maybe the wrench is too big? I couldn't imagine it being metric in 1974.
Regardless my question is what is the correct lug nut and stem size for a 1974 Ford F 250.
The research I have come up with is that the heavy duty Ford trucks would most likely have metric nuts and stud size. If the 13/16ths didn't fit and the 3/4 didn't fit then the only thing to fit would be a 20 to 21 MM nut size. The stud size would most likely be 14 MM.