Usually the lines or sunburst design goes in the front/forward clutch drum (the one with the input shaft pressed into to it) and the rear drum or 3rd/direct are smooth/no pattern, but it really does not matter. When Red Eagle Racing Clutches are used, we use smooth/no pattern in both clutch packs. The same when Red Eagle Racing Clutches are used in 2nd gear, the are smooth/no pattern. Start with a steel against the piston, then clutch, steel clutch and so on ending with a clutch under the pressure plate, then the snap ring. Rule of thumb as far as clearance goes, it's usually .010 per clutch. Burt
If you mean indexing the outer diameter teeth then no.However if you have 2 different thickness steels making up the pack it is nice to put the thick steels in the center verses the thinner ones as there is less heatsink the farther away from the piston or pressure plate the clutch or steel is.