[paulspickupparts]

I would not used your cab to engine measurement to tell if you clip is crooked. Measure and re measure your clip to frame . Make sure neither has ever been tweeked or wrecked. Measure every way you can length , width , triangulate diagaonal and more. If unsure take it to a shop with a frame machine. Your key is the frame . If you using cab to engine gaps to determine if your frame is correct that may be bad recipe.

Kind of like this . If you ever build a house or shop with and unsquare basement or foundation it will cause problems all the way to top of the house. Good luck.