V8 acc. cable and pedal assy.?

I am installing a V8 acc. pedal and brackets in my 66 Dart and I have 2 questions.
1. What holds the pin in the pedal assy.? I have the pin but there is no clip of any kind. Is it just a press fit?
2. The piece of the bracket assy. that mounts on the engine compartment side of the firewall, Does it need a gasket? I only got a gasket for the inside with it.

Thanks in advance............