The 60 will fit. The pad spacing is a little wider I think and the short side is 2" shorter than a chevy but they bolt in from what I understand. I had a fullsize J**P 44 in the front of my K5 and a Dodge 60 in the rear when I got it. Not sure on the 70 rear, I'll have to check it's measurements. $1500 OBO for the pair. Bunch of other stuff for sale around CK5 too. Axles, etc.