I have a Rochester 7028264 that I might like to have professionally rebuilt, replated and tuned. Before having that done, I need to confirm its authenticity.
I am asking for a couple 7028264 owners to examine their carbs for the part numbers on the three major sub-assemblies.
The carb I bought has a layer of grime, suggesting it has been undisturbed for a long time, possibly never. The issue is that the numbers on it do not match the numbers in the parts catalog.
- The throttle body (base) is stamped 7037174 yet the GM documentation shows it should be 7035577. - The bowl (center section) is stamped 7034973 yet the GM docs show 7036330. (This part also has the carb assembly 7028264 number, a plant code but no date code.) - I cannot find a number on the air horn (top). GM says it should be part number 7036419.
Are other 7028264s like mine? Is the parts book wrong? Was this carb I found rebuilt decades ago with a variety of parts? Is there some other explanation?