what size of upper ball joint socket do i need for my 70 roadrunner??
Call Mancini Racing 1-800-843-2821 or go to their website, they have all the proper suspension tools you will ever need, for reasonable pricing... You will probably need a Torsion bar tool also so you don't nick up your bars trying to get them out of the lower control-arm pivots, the whole kit for all the tools is MRE66489 $159.95
Proto #6550 It's the larger of the two that's used for A thru E with the A cars using the smaller one. There's no size stamped on the Proto socket that I have but if needed, I can measure it....