Hello, I'm just looking for some information and I hope someone can help me.In 1966 the autolite changed from the (1.12) 600 cfm carb to the (1.08) 480 cfm carb, any reasons why? Also, usually when a carb is downsized the horsepower will also go down yet ford stated that there was a increase in 15 hp for this model year. It all seems strange to me. What I'm wondering is what would happen if you put a 1965 year (1.12) carb on a 1966 model. Will it fit? More power ? Anyone have any idea's on this. Thank you Mike

Go to Ford Carburetor .com.
Bill White has all the answers

Thanks Josnuff. I contacted Bill White and found out everything I needed to know.It seem's that there was two 1966 carbs for the thunderbirds. One was the 1.08 autolite 4100 480cfm for California cars, and the other 49 states had the 1.12 600cfm carb. By the way Bill White can be found at www.network54.com/forum/88781 Mike.