Mine is also an '83 and it has a mechanical clutch. Hollander lists the '83 by itself, but doesn't say why, and the guy on ebay selling that bellhousing said '83 only also. My guess is that one of us doesn't have what we think we have, or GM made a change before the end of the '83 model year. Hollander isn't good at keeping track of these kind of changes.
Does your housing have a rectangular cover plate on the drivers side? if it does, then its a good chance you can convert it by getting the right arm and dust boot.
FYI
Keep in mind that the V8 version is the only one Chevy used with the fine input spline.
