Guys, I'm gonna put my 2 cents worth in here. I have a .060 over 261 whith a howards m4f cam from Patricks, fenton headers. It's a 59 model full pressure motor, I have run it with the roch. model B. It runs ok. With a holley weber from Tom Langdon, gets good mileage but lacks midrange power and kind of lacking on top end. Have run rochester monojet and it runs much better pulls stronger through the whole range, especially mid to top end. I don't know about the cfm ratings, just my observations from running different carbs.
