Jon,
To the best of my knowledge the pivot ball was only used on car applications prior to about 63. You will need a V-8 bellhousing and your existing clutch linkage should work. However, make sure that the V-8 bellhousing will match up to your existing rear crossmember.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine