I took it out and didn't put anything in its place, since it doesn't penetrate the firewall or floor. I suppose my pedal could be bottoming on the carb linkage rather than against the kickdown switch, but I don't hammer it that hard and haven't had any difficulty from it in five-plus years.
But come to think of it, I should check just what the pedal travel limit is in this configuration. The answer may be surprising, or not.