[72cheyenneman]

I have a '72 Cheyenne with factory lug nuts on the wheels. I bought a jack with tools off this site that was for a '70 Cheyenne. Are the lug nuts on a '72 bigger than the '70? I put the tire iron that I got with the jack on the '72 lug nuts but the tire iron is too small. Anyone ever had this problem? Thanks, Casey