Here are some pictures of what '68OrangeSunshine described. The first picture is the back of the accelerator pedal. The second picture shows the firewall linkage and mounted ball studs. The third picture shows the mounted accelerator pedal. The forth picture is a small block throttle rod that goes to the carb from the firewall linkage.
Here's a link to Classic Industries showing most of the parts.
https://www.classicindustries.com/sh...?q=accelerator