Which Carb Type?

My 340 Duster had a 600cfm Holley on it. At the time I thought it ran ok and worked good. But could never really get the tune set up. Pulled it apart oen day to find the rear bowl Full of scale. -The joy of buying a car sight unseen- So a guy at work lends me his edelbrock of unknowen size of his warmed 390. It was ever worse! Ran and started like ****. The guy who had it on his 390 never had a kind word for it either. So I figured I could buy a new edelbrock and be unhappy, Have a Holley and never get 100% tune down or spend 100 bucks more and have a Demon.

Bought a Demon from Don. Learned how to set it -sure its not 100% yet- Carb came jetted and ready to roll for my engine. A few test and tunes on a lonely highway and the car starts good has amazeing throttle response and not a hint of bog. And as a bonous everyone always thinks a demon looks cool. I run no choke on my car and it never fails to start even when its cold, I store the car for winters and it still starts good. Last winter it sat outside and would fire up at -15deg c with no issues.