68c10 swapping to discs got new spindles and stuff off 69 need help pls

[clean68sbc]

well i have a 68c10 heavy half ton 6lug drums. i went to the junkyard and got spindles calipers and pads n just ordered lmc truck 6lug rotos all came in went to put on and the upper and lower balljoints are too big? soo im imagining that they changed it for 69 ordered ion new balljoints hopefully to sovle problem bc 71-76ones dont fit when i checked at autoparts. some input would be greatly appreciated on the balljoint situationnn. thank you