The pics are nice you sure have done a lot of work. With all that work you have done on the firewall it looks real nice. I haven’t seen a bolt on frame mount for the pre 47’s. I used a 78 Impala it was simple to remove and install. But you are going to have to drill holes in that clean looking firewall. The firewall flex is an issue. I had to run a brace from the bracket to the dash and that stopped the flex. The master and reservoir is all steel and made for a level installation. The booster and master come out a ways and the lines come out on the outside. Inside the swing pedal wanted to come down the left side of the column. I ended up with a collection of half a dozen swing pedal arms with all kinds of bends and angles. I ended up grafting one on to the original swing arm. The right side of the column can get a little busy with the gas pedal.

Don’t over look a Jeep column. The 88 wrangler (YJ) used a GM column lots of Standards but key in column. Maybe an older CJ may have the key in the dash.