Recently I converted my 351 Cleveland from a 2 bbl to 4 bbl Edelbrock 1405. It starts and runs at idle perfectly. revs fine, but when I drive it, it feels sluggish and miss fires sometimes. Is there anything else I should change or upgrade on the engine? I do plan on adding headers this August.

 

You changed the intake also, right?

 

Correct

 

Tuning a new carb can take time and patience. How many cfm is it?

 

Was the carb new or used?

 

You used the 4 bbl intake for the 2V heads correct?

 

This 20 questions is getting old OP, tell us some details so we can help...

 

Sorry for the delay, traveling for work.

Yes, purchased a new carb and intake for the 2V setup. Installed and hooked up all the vacuum lines. I have not changed much else. I am a little tone deaf (can't tune a guitar for the life of me), so when I try to adjust the idle screws like they show on edelbrock until the rpm's go down, I do not hear that. In fact i hear no change at all. Could that mean something? Am I missing something?

 

You might want to get a good tach, or have someone in the drivers seat watch the dash for you.
Or put a camera in there that you can see while tuning. Hmm Tach selfies?

 

Get a vacuum gage...and advance your timing to just below pinging.