I bought all new wheel cylinders at my Local NAPA store and the guy there said "I've been doing this for 20 years and have never seen anything like that" refering to the 7/16 x20 threads in the wheel cylinders for the crossover tube. if you have the two nuts off of the line you can make a new line with them. thats where I am having trouble i threw my away thinking no big deal I just get a new one. and by the time I relized I needed the old line for the nuts it was already to late .. and as for the pitting I thought that to just hone them out and put in new parts NOT this is the fourth time taking them all apart and putting them back toghter again ,,, those duals are getting heavy... and we put on new tires 8.25x20 on the old 2 pc wheels (widow makers) next is the front brakes