crownwags 83 chevrolet C10 discussion

[Testament]

double check tyres and measure wheel centreline or rim height from ground - make sure these are the same side left to right at front and at back. doesn't matter if different from front to back as long as they match side to side at the front and at the back.

then measure ground to chassis at both front and rear leaf spring/shackle bolts left and right (the bolt on the chassis side of the shackle - check the shackles are the same left to right while you are there), and same at the front, ground to front and rear a arm bolts. try to be as accurate as practical,  +/- 1mm would be good (measurement accuracy, not difference in heights)

if you can use a plumb bob or a square or something and mark their locations on the ground, again spend time to get as accurate as practical within a couple of mm, its a tricky thing unless you spend time to make some fancy jig. then draw a bunch of lines to see if the chassis is square. Ideally the opposing diagonals should be within about 5mm but 10mm is probably OK on with something like your truck and the accuracy of the measurements.

draw a picture/table with all the numbers and report back