is this for your 93 pickup that already has the external slave?
if so, the internal slave bellhousing will NOT bolt up, bolt pattern from trans to bellhousing is different. *all bellhousing to engine patterns are the same)
plus, I dont really care for the internal slave. gotta tear it all apart to change it, whereas all you do is grease the pivot ball every oil change, and if the slave goes, you spend about as much time as a starter to change it with the external bellhousing.
So, my vote is to stick with the external slave like what you allready got.