Where can I get a Hydraulic clutch for 383 dart

If you're looking for a packaged kit instead of cobbling together all the components yourself and fabricating a slave cylinder mount for your bellhousing I'd suggest the kit from "chuck's classic autos" http://www.chucksclassiccars.com/index.php?cruising=products&item=HYC833&category=Specials for $369.00.