I'd like to replace my oem rear shock with non-air. Progressive Suspension 412-4222C seemed to be the way to go, but when I clicked "see compatible vehicles" and inputted my '81 Interstate, it came back as incompatible. Can anybody help clarify and get me pointed in the right direction? Thanx, Dave
https://www.ebay.com/itm/Progressive-Su ... #vi-ilComp
https://www.ebay.com/itm/Progressive-Su ... #vi-ilComp