McCleod, Hays, Zoom, Center Force, Mopar Performance, Depends on your preferences & your budget, how the car will be actually used, will it have slicks or drag radials or be raced ??, then you should step up some IMHFO... There's many brands out there to upgrade with, but a stock clutch can & will work just fine, but for how long your guess is as good as mine... They're not legal on a drag strip/racetrack with slicks or drag radials thou... I'd bet a good performance clutch from any of the companies listed, will work a little better, for a little longer, there has been many improvements in clutch technology over the last 40+ years... If it's for track use, then get SFI approved, Flywheel & clutch, driveline safety loop & scatter shield/bell housing is also mandatory, if you run slicks or drag radials on any sanctioned track, you will need wheel stud/nuts that are open & stud threads sticking out past the nuts & after market SFI hardened axles or they wont let you run... Your 23 spline trans & universal may be the weak link thou, an 18 spline is a letter better, some really good 2790 or 1350 universals are a must too, depends on what yoke &/or rear axle you have... My suggestions are, Probably overkill, but that's me... good luck whom or what ever you decide on...