As a fellow builder, I used their lower a-arms on a customers 68 Camaro and they did not fit well. The car was stock height but the outer portion of the lbj pocket dug into the bottom of the backing plate causing it to rub into the rotor makign an awful screaching sound with the body only having about 200 street miles on a fresh resto. I tried to talk the customer into a full Hotchkis line becasue I know their quality is A1 but he wanted to save a buck...I guess he did but I had to remove the backing plates to eliminate the rubbing issue. Plus the overall machining quality was not nearly as nice as Hotchkis or GW. I'd give CPP a C- for a grade.