Brake conversion. Lower control arm swap?

i can't tell from the pics, but a 73' dart would not of had 11" disks. they would of had to have been changed out

‘73 Dart could have had 10.95” disks. Lots of people call them 11”, although that’s not really accurate. He’s probably not talking about the 11.75’s.

so the tabs are in the right place for your stock 71' K-member. you can use any sway bar designed for 67' - 72' dart

that last bit isn’t exactly true. The Hotchkis 67-72 bar does not use the stock sway bar tab location. Neither does the Hellwig “pro-touring” sway bar for the 67-72 cars. Either of those can actually use the 73+ tabbed LCA’s.