Anyone use a QA1 K member on a 74 Duster

Thinking of going this route if it will work, the QA1 is designed for 67=72 was wondering if anyone has adapted one to work on 74
I believe on there website it says you can use it, but you have to change over to the earlier idlers etc, pitman arm and so on.
I have not done one though. Give them a call.