I am adding power brakes w/ firewall booster on my '53 Chevy pick up. Am also adding a Chevy tilt column so that makes it a little different from your appilication but I think you can use my method anyway. I got the booster and the inside dash/firewall/brake pedal bracket from under the dash of a Caddy at Pick-A-Part. I got the Caddy but any full size GM car(mid-70s thru mid-80s)have brackets will work. This installation will require disassembling the car dash to install easily but if you are installing power brakes, you are doing a lot of work anyway. I left the existing truck support bracket there and modified the dash side of the new bracket to bolt in place using the stock pickup steering column bolts. Having these two brackets there give a very strong structure with triangle bracing in two planes. Takes a little cutting and welding but it's not brain surgery. You might need to lengthen or shorten the bracket to fit in the car but that is easy too. The firewall side of the new bracket wants to be flat with the firewall, then drill the holes in the firewall to match the holes in the bracket. Cut a hole in the firewall with a hole saw to clear the brake booster pushrod rubber boot and the bracket will bolt in place and give a very rigid mount. Added benefit is that you have the brake pedal and stop light switch already mounted. The pedal may be a little too high off the floor (it is in my truck)but you car might be ok. If the pedal is too high you can cut the arm and weld in an inch or so of the right size of cold rolled steel bar, heat and bend the pedal arm to put the pedal the proper distance from the accelerator pedal and you will have a CHEAP, factory looking power brake installation.
[ January 03, 2003: Message edited by: firstname.lastname@example.org ]</p>