When the clutch and flywheel went on me originally, I talked with a few different places,(Tranny Shops, Mechanics), and the general consensus was that the single mass was better.

Now, on another note. Finally tried driving the truck today. It spent some time in the driveway as I did work on the engine. New glows and a girdle for the valve cover so it wouldn't leak anymore. Had my dad give me a hand bleeding out the clutch. Can't seem to get it to stiffen up. It will seem to have pressure, but then it will get softer. Very frustrating. Then when it is running, you still have to pull it into gear and then with the clutch pedal in, it is engaging and pulling truck forward. Once in gear with the clutch up, it is very solid contact. Won't go into overdrive either. I am trying to figure out if this is due to the slave cylinder not pushing in far enough. I am thinking of taking a pushrod and making a longer slave rod. I dunno.