Frame Connectors - install question

It's nice to have adjustable jack stands or the like. The doors need to fit well first. Know the feel of the fitment.
I have scrap stainless steel shim stock in various thicknesses I got from the scrap barrel at work. Chopped it in the shear about 1" wide 6" long. My shop floor is pretty close to dead level, that little bit of extra I can get by using various thicknesses of shim stock between the jack pad and the framerail. When double checking level at the rear before putting in the transition pan in my sons 69 notch I used a piece of heavy angle iron across the bare rear framerails with a level on it. With that done, it's time to move on to the wheel houses and trunk floor. I ran the rear stands up forward of the front spring perches so I could roll the axle out with springs and tires attached. They were in place at the rear of the car for welding. It is nice to have them there for now to get it high enough to work under it.

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