Everything in your statement. The 15/16” master should work fine. The 1-1/32” isn’t a better choice in my opinion (I’ve run both). The long travel in this case isn’t an issue with the master cylinder diameter.
And the power booster comment is wrong. Yes, there is a linkage difference, but it doesn’t work the way you think it does. The factory ran 15/16” masters with the power booster and 1-1/32” masters with manual brakes.
