After the fruitless attempts to get the Rochester to work properly, it was suggested that the Carter was a better carb....then someone was kind enough to send me a Carter spec list which identified the exact model carb for a 1967, 250 cu in, manual choke...which is 4375S.....I located one, and was under the impression that it would be the correct fit & replacement for the Rochester.....I'm not really inclined to modify the linkage or start making any modifications to the carb....It either fits or not....On a previous post I considered a Chinese aftermarket just to see if I could get this truck to run 'off choke' I didn't get any encouragement, that's when the topic shifted to the Carter...... So now I'm back to square 1......I'm just not getting all of these posts that are carburetor related problems....The truck starts, on choke, warms up and won't idle when the choke is pushed in, in attempt to keep it running I have to rapidly pump the gas pedal however it will spit & sputter.... Its not a vacuum issue as I checked it....all the reference is on my other post.....What could be so wrong???