I was looking at the Motorcraft carb that's on a 1980 AMC 360, where is the venturi number(180) supposes to be?
Does anyone know if the 80's 360's had a 2100 or a 2150, and what size they are?
I did find a site that has an exploded diagram of the 2100/2150 but they don't show the differences.
http://www.carburetorfactory.com/evindex.html

I ran across a site that talks about little rods in the air bleeds. I'll have to take a closer look. Can these be seen looking down the venturies?
The site is from one of these High Mileage sites so keep that in mind, anyway they did have good things to say about the 2150.
Here is site and the quote about the 2150.
From http://eagle-research.com/fuelsav/faq.html
"We usually recommend people with 4 barrels to go to the Ford Motorcraft 2 barrel (with manifold adapter) model 2150, which is (in our opinion) the best all around carb. We've ever seen. You don't lose much power or performance and you get a major leap in mileage.

The Ford Motorcraft 2150 is one of the last actual carburetors made before fuel injection, and in our opinion, one of the best downdraft carburetors ever installed on a 'factory' automobile. It's very basic simplicity yet very high efficiency ratio is astounding.

You can tell a 2150 from it's 2100 ancestor by the little rods that rise and fall in the venturis as you work the throttle. These small tapered rods make the air bleeds variable as the vehicle uses more or less fuel. This simple function makes the 2150 one of the most efficient carburetors ever manufactured. Because the Carburetor Enhancer actually enhances the operation of the air bleeds and because the 2150 has one of the best air bleed systems, we've doubled the mileage of these carburetors more than any other."

The MC2150 is just a MC2100 with altitude ajustment.

Here is a great link that helped me through the install. Thanks Tim.
http://bbs.off-road.com/wwwthreads//...view=&sb=&vc=1

bandhmo