1972 Dodge Colt

Screwing around with my pedals and throwout bearing issues.
I think I am going with the S&W pedal kit and looking at the mechanical linkage.
If that doesn't work, my good friend Mark suggested the Hydraulic System that Summit sells.
Anyone know the difference in these 2 pivot mounts?
Beside the obvious size, the light grey one is from a 273 bellhousing, the other I don't know.
The short one seems to be right for my Lakewood.
Clutch and Pedals (4).JPG Clutch and Pedals (2).JPG