Edelbrock or T-Quad

Hmmmm.... seems like most of the problems on here are due to overcarbureting. Read the Edelbrock website and manuals. Even running a 600 on mild 318 is too much. It's recommended for 350 c.i and up. So for mopar stock/mild 340's and below, I would suggest a 500cfm. I'm running a 500 with mine (model 1404) and it's prefect, really.

different engines react differently to different carburation.....more or less how you tune the carb. I believe appropriate jetting/settings are more important than how much CFM a carb is rated at. Even Hot Rod magazine did an article awhile back that pointed that out. It is possible to run a bigger carb without issues, just make sure you jet accordingly.