I would try the 71/72 caliper and pads first ---- bearings and seals , 71/72 flex hoses --you need to modify the 71/72 outer tie rod ends if you are using the 65-70 steering link ---see link below
http://67-72chevytrucks.com/vboard/s...d.php?t=188551
And I assume you know you need to use balljoints for the 71/72.