Either will work, bolt pattern the same and TOB contact the same OR you could up grade to a 11 inch, the flywheel is the same and the bell housing clears without issue. The diaphram style offers less leg pressure, but I agree that it was used later in the CJ run, as I understand it anyway. I switched mine from a 10.5 to a custom built 11 with heavier springs and stayed with the 3 finger style. If you have a local clutch rebuilder left in town go have one built and they should be able to resurface and balance your flywheel as well.
AND 2 buck will not buy a cup of starbucks.