Longer shocks?

Looking for a shock for my Duster that`s around an inch longer than stock. I know that Mopar sells a drag shock for SS springs but wanted to find a cheaper one that will work. I heard that C-body ones are an inch longer but just checked NAPA and they list C-body ones at 13.625" and Dart ones at 14.125", this seems backwards?

I have put and still have on my 1972 Plymouth Scamp a set of Shock Extensions that I found worked perfect both in expansion and compression. I have new sets for sale, @ 15.00 a PAIR, plus shipping, Let me know. [email protected]: