Confirmed it today- the '67-'72 booster is indeed 7 1/2" diameter, and the bracketry is the same as used on the larger diameter '73-'76 booster. Even the booster bolt pattern is the same. View attachment 1716207178
I appreciate you researching that, there is a lot of good information coming in and sadly I don’t know a lot about what we have. I’m passing all this on to the mastermind behind this. Thanks again