What clutch fork and z bar to use?

I have a 64 barracuda 360 10.5 aluminum bell housing 4 sp, things don't line up right at current instead of the clutch rod fitting in the normal spot on the end of fork they drilled a hole about 1 inch in. what would be the proper length for the fork? zbar? at this time it's real difficult to depress the clutch.
If I needed a shorter fork could I accomplish the same result by just modifying the z bar?
thanks