Throttle pedal/ cable assy. ideas needed

[SideStepper]

Looking for a good throttle pedal/cable setup for my 55.2 truck with a BBC carbureted engine. I would like to keep the original style pedal, but I don't really like how the factory hinged it from the floor board.

I am considering a Lokar pedal that pivots on a shaft & then modifying it so I can attach the original style to it. Another concern is where & how to secure it to the firewall. All the firewall surfaces are angular &/or rounded etc. making it difficult to locate a good mounting surface.

If you have experience with this issue & have suggestions that would be very helpful. Thanks