I have a Zoom 30000 series pressure plate that was bolted to my 74 AMC 401 w/a T-18 trans. Also have the Centerforce throw out bearing (N1439).
All this was brand new, first run smoked the clutch disk and decided to go auto after that. Below are the specs on the Zoom.
I still have 2 different pilot bushings a second pressure plate w/clutch disk and 164 tooth flywheel. Any other questions email me at foes03fly@yahoo.com.
looking to get $70 for the pressure plate and throw out bearing. $75 for the flywheel and $65 for the other pressure plate and disk.

30000 Series
American Muscle Car Performance Clutch Sets

At ZOOM®, we have not forgotten how our reputation was established. We continue to offer ZOOM® Performance Clutch Sets specifically for '60's and 70's American Muscle Cars. Building clutches for those cars is what earned us our good name. After all, those cars still give the cars of today a run for their money. These sets include higher clamp load ZOOM® purple cover assemblies and organic clutch discs with high burst strength organic facings. They also come complete with release bearing, pilot bearing/bushing and alignment tool.

• 20% to 60% increase in Torque Capacity over a stock clutch
• Complete 5 Pc Sets include everything needed to do the job right
• Premium, High Burst Strength Organic Facings
• Higher Clamp Load Cover Assemblies with ZOOM® Purple anti-rust finish
• Specifically for '60's & '70's American Muscle Cars with mechanical linkages

Centerforce Throwout Bearings
http://store.summitracing.com/partdetail.asp?part=CTF-N1439