I would think the 2bbl is a little more simple than a 4bbl. The Motorcraft 2bbl is freakin awesome some models approach 400 CFM, and I learned from old school AMC Jeep guys that they can run upside down for a little bit. The Motorcraft 2bbl is one of the best carbs ever made. I can see why people would want a 2bbl in place of a 4bbl when the only choices are Holley, Edelbrock, and factory spreadbore carbs. I personally went with a Q-Jet, but it's probably more work to install than a Motorcraft 2bbl.