Update.
My little V8 60 is still stumbling. But after more tinkering I have more information. It's a stromberg 48, not. 97. I was told it was a 97. It has #48 main jets, and a #65 power valve. The motor has a stock rebuild, with stock intake. When it's cold pulling the choke helps the stumbling, but when it's hot the choke makes worse. Over all it gets worse when it gets hot. My adjustment screws in the base are a little more wiggly then I thank they should be Also the spark plugs are blacker then normal. After all that, any ideas?