Slant questions for my upgrades.

I'm planning similar mods for my 73. Besides Lokkar, Bouchillon Performance makes a universal kickdown linkage. I was told to look for a Super 6 or V-8 throttle cable for the 4 bbl. The exact length is going to be determined by whether you mount the carb forward or sideways.

I'd be inclined to find some junk material to drill/grind down to simulate the thinner header where it would be contacted by the triangular hold down. IMO it's better to build up the header than to trim the intake. Obviously others feel differently.