So you ported the heads. 1200cfm of fuel. Wouldn't you want a 2.02 in. at least? Shifting a 4 speed makes a big difference hit or miss. I like the old school combo. Because I am old. Good luck!
Hate to be a stickler...but carb CFM ratings are for AIR, not for FUEL. So you can't say he has "1200 cfm of fuel". Well, you could, but that would be incorrect.