i use a ch28 with two 600 edelbrocks on a 440. i think it's the best street induction system i've ever used. very smooth power and very low maintenance. far less trouble than the stock single 4bbl set-up on my '69 r/t. i was a die hard 6pak guy for decades but for half the price and no major power loss i'm happy. too many myths about multi carbs. the key is to match the carbs up and use a good intake. the edelbrock should be far superior to factory iron on a RB engine. B engine guys don't have a good manifold choice. if those older single planes have to be used pay attention to the torque curve. peak power doesn't drive the car.