Need a '63-'66 1/2 ton lower ball joint measurement

[chevy_mike]

Hi guys, Went to NAPA to look at a lower ball joint so I could get a measurement and they did not have it in stock, so no luck. I am hoping someone might have one laying around to measure. I need the outside diameter of the mounting area, where it presses into the A arm. I did this on a '96 ball joint and got 2.307" in diameter. This was done with a digital caliper. I need an accurate measurement of a 1/2 ton one to prove or disprove a thought I have.

Thanks in advance guys.