I'm trying to chase down a tuning problem I have with my 355. This is my first build and I have very little knowledge when it comes to carbs. My car is running super rich and I've tried adjusting the mixture screws but its doesn't seem to change. After talking to a few different people a common answer is i need to change my power valve. Will a stock power valve with that cam cause my running rich. I'm pulling about 10 to 12 lbs of vacuum. So I'm thinking a 5.5 or 6.5 valve. I know alot of people run that cam so I was hoping I could find out what other people are running. thanks.