Ron,

1963 model C1404?

What size engine?

230 & 292 used different downdraft Rochesters.
Both had manual chokes (at, least with manual transmission).
The spec manual makes no mention of of a throttle cable (maybe someone will post better documentation?).

The 2-speed Powerglide automatic transmission was available with both engines. An automatic choke might have been used with this option. A Rochester was most likely the carb used with this option?