Tubular K Frame Identification

Hi all,

Trying to help my father-in-law out... a few years ago he picked up a coilover conversion kit for his 1971 Challenger at a swap meet. He’s never quite figured out how it goes together, and it seems like he has some missing parts.

We’ve scoured all the included parts, and the only markings are some Allan American stickers on the shocks. Aldan American has coilover conversion kits, but no 70s Mopar kits, and look like a different style altogether...Wondering/hoping if anyone on FABO can/will recognize what he has.

I have a feeling he got bamboozled. If it is indeed for a Challenger, and we figure out the brand, maybe he can make the kit whole.

Happy to provide more pictures. Thanks in advance!
-Matt