My 68 2+2 has always had a slight brake pull to the right. Not huge but still there. I fought with it years ago and finally just loosened the brake setting on that side to smoothen it out to a point of being hardly noticeable. Well this past weekend I converted the front over to 70 single piston disc brakes. And taking it apart I did notice the right shoes heat cracked. Anyway when I went to hook up the lines from the master cylinder to the distribution block, I found the front and rear lines opposite. At first I thought ok the blocks are different and I need to use the 70 block. Once I removed it and had it on the bench I could see it was installed backwards.  Its designed to be one inlet and two outlets for the front and one inlet and one outlet for the rear. In backwards, the front inlet supplied the rears and left front. And the rear inlet supplied the right front. Looking closer at the original lines one could see someone bent them to make them fit the backwards block. This block was actually bolted on its bracket backwards so had to have been replaced at one time. Firstly why would you ever have to change one and secondly why would you bend the lines to make them fit? If the lines dont line up maybe there is a problem. I hope it wasnt done at a repair shop. Anyway my pull is gone and most likely would have been gone with the drum system as well. Ill post some pictures later. My phone is going dead.