completed disk brake upgrade...now i need to install front sway bar!!

there are at least two styles of factory bars you can use. It depends on your front xmember.
What one are you using?
I think up to 71 the bars went around the front under the xmember and attaches quite a way out on the LCA.
72 might be a crossover year, it looks like it has mounting holes that can accept either type. I put a late swaybar on my 72 Swinger thru the flat pad motormount style xmember.
73 and up the bar goes thru the spool type xmember and doesnt attach as far out on the LCA.
If you use the early bar with the 73 and up disks you might have clearance issue when turning tight.
70duster440 flipped his calipers to be rear hung and that cleared his swaybar. you can see what he did here--
http://www.70duster440.com/index.html