Super Stock or Stock Style Leaf Springs for my 69 Barracuda.

Jegs does sell shocks.
After yours are installed, measure the pin to pin length, at ride height. Then shop for a shock that puts that measurement close to the center of the shocks range of travel. For instance; say your pin to pin comes in at 18.5 inches, and you find a shock that is 15 compressed and 22 extended. That 18.5 puts you dead center of that shock's travel.Then you probably want an adjustable shock, cuz you drive mostly street, but want to occasionally drag-race it. These are normally two different shocks; but one adjustable one, may cover both bases.
I think 72bluNblu talked about this, in a different, recent thread.
I have some 40 year old 3-way Munroe-matics, that do neither very well, but they just won't wear out; and I hate to retire them until they do. If I had a teener, I woulda had to swap them out decades ago. But with 420 hp, they are kindof fun, and I'm not sad about the 2.2- 60fts.