Just lookin at your pix reminds me of my experience of putting a MII in my 55 about 5 yrs. ago. I used the TCI weld in unit with tubular upper and lower A arms.You are doing things just right,measure 3 or 4 times before welding in the crossmember,or in your case drilling bolt holes.Be sure and post some pix after you get it all back together.
