Since you don't say what series your truck is, I will quote from the manual for a series 10-40;
"Vehicle curb height measurement is taken from the bottom edge of the cross member to the top outer flange of the lower bumper bracket at center line of spindle".
The measurement for this series is 41/4 ". Adjust the torsion bars to fit this measurement. If you want a picture, send me your email address to my office at
[email protected]Note: the truck came originally with 6 bolt 15" rims, so if the front has 14" 5 bolt rims, the spindles were changed, or the hubs were modified or.....who knows !