Yes, I did mention the aluminum dash frames. I actually got to see one of them once at The Nationals in the early 90's.
There were allegedly only four to eight of them made for the 2% FX cars of '64 and '65.
The first four aluminum dash frames were installed at various time points on the '64 2% Hemi FX cars. Supposedly later the following year, the next four aluminum dashes were secretly installed on the four '65 2% Hemi FX cars because by then, aluminum was outlawed.
These are not to be confused with the '65 10/15 A/FX Altered wheelbase cars assembled at Amblewagon in Detroit. Those 10 to 11 cars received all their dashboard frames in one piece fiberglass.
Now mind you, I heard from a Michigan birdie that at a certain BBQ party, there was a stack of aluminum dashes in the basement of that home. Can't remember who exactly.
All of this is perhaps folklore legend, but I can tell you this. A 1965 A/FX lightweight stainless K- member was right here in Brooklyn on a street race car for many years. It ended up in the garbage because the gentleman didn't want to repair and weld all the bends and cracks. Go figure.