Im trying to find a chaincase for a 93 xlt special. The case it has in it now is part number: 5630412. Ive been looking around, and alot of cases look like they would bolt up, but they are different part numbers, and have little differences. What Im trying to figure out, is, what other cases will work on this sled? Or, how many new parts will I need to update it to maybe a newer or nicer, or more importantly, more available chaincase. Any input would be greatly appreciated!