my first 742 case rebuild, need alittle advice please

Well as I said earlier I can't throw them out there all I got until I can get new ones just found out my poor old dog has cancer so got to spend some money to keep him comfortable so maybe I will look for a good coast pattern I've been playing around a bit and with 68 thou the pattern is in the center on the drive side but not real deep I tried playing around with the backlash but it still isn't right I had gone from 72 to 68 so maybe I will go up a thou?