help ID carb

The number on the left front bolt boss is "C9 4200S".

The AFB ran great on the road, and was ok offroad; definitely better than the Holley I had on it. I tried a 390cfm Holley, but it was awful off-road.

It is a shame, this came off a car that looked pretty original and complete, at a pick and pull. It was definitely restorable. I had my Road Runner at the time though, so I was not interested in another car.

I did all this 20 years ago. Shouldn't have taken it apart. But, I did keep it all together.

'Course now browsing thru this site, I miss my Roadrunner...