‘68 Master Cylinder question

The top one is from seller Steve Kirschenbaum. I've bought a few things from him. He and his brother Al have been neck deep in Mopars since the old days. Al worked at a Long Island Dodge dealership. He used to prep magazine cars before the writers tested them. Then he was an editor at Motor Trend and produced a lot of TV shows.

Al in a test way back when.
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*Edit*
The Al Kirschenbaum that was in the TV business was a different guy.