Reference points

I have to pull the front end apart and fix and reinforce all of the broken front suspension mounts at the very least or I might swap in an entirely different front suspension from a dakota.So after its sitting level on jackstands I am going to measure 9000 times before I unbolt anything or attempt surgery.Then while I am at it I will square up the rear suspension as well.So its sounding like the torsion bar crossmember is the only thing under there that I can square the suspension to, is that correct?