I did mine much like 71 deputy's, except mine are located a bit more inboard on the forward end. Chrysler was kind enough to supply a bracket to weld to in this location as part of the iso set-up. You can see part of the bracket in one of 71 deputy's pics.

Maybe I work slow, but it took me 2 12-hour days to get them fabbed and welded on. The metal supplier made me buy the entire 12' piece of tubing, but that's enough to do at least 2 cars.