Yes, they were built by New Process. Funny name though. You can learn everything about them on BigBlockDart.com Something you might want to look into is a factory setup for hydraulic actuated clutch. My '95 Dakota Magnum V-6 has that set up with the 5-speed. If you could find one in a bone yard, you could scrounge the bellhousing (fits all smallblocks), the clutch outfit, throwout fork & bearing, hydraulic slave and the clutch master cylinder. I haven't done this before but from looking at it, it sure does look feasible. Good luck. If you try it, let us all know about it, OK?
Pat