Best way to remove upper ball joint

I know of only 2 sizes for A-bodies. The smaller one was in cars before 1973, and maybe later if a slant. I think it ties to the change from SBP to BBP wheels. Remove it while the UCA is in the car. I uses a big pipe wrench on my 65 Dart, but later got the correct socket, so an not to mar my pretty paint. It is American Muscle PN 23456, with no markings on the socket itself. Did you first remove the grease fitting so the socket can go all the way down?