lower ball joints, help

[jessewebb]

Hey guy's I took my 69 C/10 to have the front end alligned. Guy tells me I need new ball joints. So I've been online, advance,autozone and napa. every one I've tried so far is shorter that the one I took out. In shorter I mean, I can barely get half a nut on the ball joint, it doesn't come through the spindle far enough to get a cotter pin back in it. The old one had plenty of room to put a cotter pin in and tighten the nut with some threads sticking through the nut... Whats the part number I need or where can I get these bottom ball joints. Oh I tried a 72 model it was long enough to get a cotter pin in, but the ball joint was to small to stay in the bottom a-frame. I need help