I do know this..
I late August, I offered up 2 78f motors, one complete (with carbs) and one missing pistons and maybe alt cover..they had to be picked up, by the end of that month..
.. and folks just absolutely fell all over themselves ..not calling..
in fact.. not a single call or response...
which I found quite strange, considering how rabidly some 77/78 owners defend their machines, and spend endless time posting about how they were the be all/end all of the single cam 750s.. who knew.. eh!