Front End ID

[chevyhed53]

Working on my '56 stepside which has a '70s C10 front end. I'm thinking about splurging and buying a tubular A-arm setup, but I'm having trouble identifying whether the parts on the truck are '70 or '73. Trying to figure out using upper ball joints as a guide, as they differ in '70, '71 and '73. Problem is they're so close in size. Got some help with a diagram from CPP, but the measurements again are very close. My center link is definitely a '70, but I don't think that helps. Appreciate any guidance you might have!