Best aftermarket K member for BB swap

[HB Prostreet]

71 Demon slant 6. Just bought a 71 383 and 727. Want to go aftermarket K member instead of moddding S/6 one. Will the QA-1 work with BB? What is the best one without going to Coilover Alterkation model?
Thanks

 

[Professor Fate]

Talk to @HemiDenny