Need pics of stock '64 225 carb/kickdown linkage.

A-bodies with Slant-6 engines had a rotating-rod throttle linkage with pushrod kickdown through '66 (except '65-'66 cars with factory A/C, which had a cable). If you've got a cable-type throttle linkage, it's non-stock. Here's what the stock '60-'66 rod-type linkage looks like. If you'll show us pics of your setup, we'll be able to see what you've got and advise on whether it needs any changes to work correctly.

Screen Shot 2017-12-06 at 11.00.02.jpg