I need some help here, fellas!! I went out for a short drive yesterday and it ran...ok until I hit 3rd. Then it would just shudder like crazy and surge. I think I'm running lean. Something isn't working right in this carb. I found a Carter on ebay that needs rebuilding. It doesn't have a model # posted, but the owner claims he found it with a tag that said "53-57 Chevy truck" on it. I should've kept my Zenith carb
