So now the pedal is hung from the inside. I still have to pick up a hole saw set before I can mount the booster. The pedal/booster assembly came from a 1976 F250. I have a new 1/8" thick sheet to reinforce the firewall with. I'm just getting everything lined up before I start cutting holes in it. So far there are the two hinges, five holes for the heater, the wiring harness and the brake booster. I cannot begin to describe how badly I want a plasma cutter.
Mike

 

Pictures didn't work for me today. They're in an album titled 'pedals'
Mike

 

A plasma cutter does make things abit easier but your doing fine.