No neither of them is the same;
IIRC
the slanty forks are shorter; being 10.75 or something. and
the Z-bar inboard lever is closer to the trans
BrewersPerformance has pictures, and specs,and descriptions.
So according to Brewers, the slant 6 uses an 8 inch tube Z bar. The 10.5 inch fork says it’s used on 63-66 A body. Nothing mentioned about 67 up 6 cylinder cars. The fork I got with the car is 10.5 but the clutch rod from the Z bar to the fork is at a bad angle. I’m thinking a 12.5 will put the rod straight in to the fork. But I’m not sure what’s correct.