Pedal to booster rod/linkage?

carcrazyguy,
Your brackets definitely look after-market. There is a $170 MC/booster on ebay that is based on a GM booster. That one has a threaded rod on the booster, w/ an adapter to a Mopar side hole. GM's don't have a lever, but the Mopar version does. There are several other after-market Mopar setups. I am confused by the "hole" you describe that the brake rod passes thru. The firewall has a diamond opening, as I recall, so the rod could move up & down as needed. The lever on the factory booster has just a single hole to attach the pedal rod, as seen in post #4.

When I put 1974 brackets on my 1965, I didn't use the longer support bracket, which is for vertical support, since it is heavy and seemed quirky with that big, thick standoff "nut". I just used the smaller side bracket (to inner fender). I think most after-market brackets don't have either support. I put a lighter booster/MC from a 90's "cloud car" on mine, so less weight to worry about.

BTW, that lever makes the MC piston stroke more than it would if manual brakes, which is why power brake cars use an MC with a smaller bore (when different). Seems to confuse everyone why it is smaller. The lever ratio is the reason.