The cable is to short, correct?
A proper 4bbl. bracket for the engine series will alter the mounting point position.
If you can fabricate and weld… moving the clamp point forward on the bracket…. Then A V8 cable is what maybe needed or what I like better (also since I’m not a resto guy) is a Lokar (or equal) cable. They also have there own brackets to use.
We need a big block guy here.