I was going to ask about your setup. If you had a 67 /6 kmember you have to upgrade because of the 67 pitman arm. Looks like you’re good to go in that area. 67 from what I found out is a 1year only and it gets in the way of everything
I did the upgrade to a 68 to 69 k frame because of the problem with the idler arm on a 67 k frame. When you do the 73 and up upgrade to disc brakes you have to change the lower ball joints and spindles.
