Coil Over Shocks Questions

I current have airshocks on my 71 Duster and during the last two weeks had to replace them three time. An FABO friend that I was telling about my airshock problems today at Mopar At Mason Dixon said about looking at Adjustable Coil Over Shocks that would bolt where the stock shocks were.

Does anyone have these on their Mopar and/or tell me about them or where to buy them?

Thanks