GMC 3100 one ton ball joints

[Martino patina]

Hi I'm newer to the site and hope I'm posting properly, my question is I have a 67 one ton GMC and the upper lower and tie rod joints are all original with the rivited style still there. I had all of them apart this weekend to get my springs out and they all felt tight and still good but should I change them due to the fact there old and if I do need to change them what brand and part number for a one ton I can't seem to find the proper ball joint for a 67 one ton. Thanks for any help at all.