Can you just shorten the rod a little with abrasive of your choice?
That was my first thought but I couldn't risk messing that up because it was literally the last replacement part available locally on a weekend. I decided to back the nuts off the master cylinder mounting studs turn by turn until the pedal travel and feedback were fine, and then later I would make my own "spacers" for the studs once I have the measurements exact. This reman is inferior to the original because I could at least adjust the factory pushrod.