Exactly what Jim said. But first, lets be clear, this is for pre-1973 sway bar and K frame on an A-body. Yes?

Then, install the sway bar, end links, and line up the tabs with the full weight on the wheels. I know that's a PIA, but the angle and distance will be off if you don't do this. It's even a bigger PIA to correct. Been there, done that. Drive it up on some 2x10x or a ramp or borrow use of an alignment or body rack. If anything, err on the compression side by cranking the t-bars down a little because with the nose higher than the rear weight will be shifted off the nose.