Model A Sputter

[Straw530]

I just noticed the other day, that my Tudor has started to sputter. You can mainly feel it in high gear, lower speeds, but when going down the highway it seems fine. Also, at a stop sign, the idle speed now drops very low. Engine was rebuilt 1000+ miles ago, and I rebuilt the carb about 300 miles ago. It seems like it is getting fuel, although my first thought was that it was not. Thanks ahead for any thoughts