273 carb probs!!!

Yea i thought about going to a 500 cfm. Seams to make more sense, but ill keep at it with the 600.Hopefully i can get going. Id be real interested to try one of those holley 390. Might be fun to mess with one of those.
My biggest prob with the carb on there are the hard starts. Im sure that my ignition is working well but it takes a few trys. Frustrating!