I think the CSVT would be fun to run but perhaps pricey to build. The 5 speed trans has a perception of being on the weak side although BAT was selling new oem trans for like $900 a short time back. Seems the major parts are still available- LSD, konis, etc.

I just sold my 2000 CSVT for $3400 last fall and there were others in the same price range that were servicable. Just need to look a bit.