Here are a couple of links discussing carb adapters that permit using later model carburetors on the small carb flanged intakes.

http://forums.y-blocksforever.com/FindPost83783.aspx

http://forums.y-blocksforever.com/FindPost83766.aspx

Lorena, Texas (South of Waco)

Don't forget to upgrade the distributor to '57 up and if you have an automatic, forget the Edelbrock as it is too wide to connect to the throttle rod/kickdown bellcrank.

BrodieSavannah, GA

An adapter such as this one.....

http://www.speedwaymotors.com/Holley-Flathead-Carburetor-Adapter,5551.html

.... will allow mounting the later carbs on the early four-barrel manifold. It is specific to the smaller carb bores - but other sizes are available.

As Rob suggests, when you select a carb "smaller works better" for most use. The Holley 390 cfm and 465 cfm carbs work in the 4160 style and there must be a zillion guys that have used the 600 cfm version. If you use the 600 you need to use a very stiff vacuum secondary spring - and basically tune as if you have a giant two barrel on there (this is for street use). Many have used the Edelbrock 500 cfm with success as well. All in all its based on what you can afford to spend - or what you know best.

Have a good time shopping...

 
 Steve Metzger       Tucson, Arizona

ARe you asking if you can fit a 600 on an "A" ... You can buy and adapter I belive, Probably not the best on an A but if you have it try it., Smaller 4 barrel the better.



"Came too close to dying to stop living now!"

My Mistake sorry I have a 9425-A.What carb can i use ? thanks

Yup the 600 on a "b" is fine. Use a 4 hole 1/2" spacer under it.



"Came too close to dying to stop living now!"

This is the "ECZ-9425-B" manifold -



but the teapots won't fit it......? You could use an adapter on an "A' manifold to switch to the later style carb.



 
 Steve Metzger       Tucson, Arizona

i just got an intake for my 292 its a 4bbl ecz-9425-b with a teapot carb.Can i use a late model holley 600 cfm carb.I know nothing about the teapots.thanks Mike