I think the clutch disc is bent. Installed and torqued down backwards during an all night thrash while drinking.
Gonna measure again and prolly use the 1/2” spacer instead of the 5/8”.
I measured out to needing .620”. Which a .500” spacer should work. We tried a .625” cause we though the clutch wasn’t getting released. We were correct. It wasn’t fully releasing due to a bent clutch disc. You can see the one side about 3/4” is grinder off the outside.