Thanks for advise, I found out several different ways to do this swap on another site. Seems I can change the whole IFS unit, bolt it in. or a few different combinations by changing balljoints I just need the spindle on out and a different tie rod end, or change the draglink with idler and box, Or I can swap out the a-frames too, Gee desisions, desitions. some one even mentioned going to the later 6lug spindles and using a 3/4 ton lower a-frame. Changing out the IFS sounds easier. check it out on 67-72 chevy trucks.com
