It doesn’t appear in your picture that the throttle cable is attached correctly. The cable takes the place of a cotter pin and extends thru the rod with a cable stop approximate 1/16” below the accelerator rod.

Here is a page from the Assembly Manual showing the setup.
Attachments
IMG_2590.jpeg (211.32 KB, 223 downloads)

Phil
Moderator, The Engine Shop, Interiors and Project Journals

1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes
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