Per the parts book, pedal assemblies are all the same, /6, 2bbl/4bbl, 383
In 67 there were 4 cables
2843743 /6
2843745 273-2
2843746 273-4
2863734 383
In 68/69 there were 3 cables
2899335 /6
3899336 SB
2899337 BB
The 67 273-2 needs to be longer than the 273-4
The 68 340 manifold was taller...