Holley Carb Help

[rsalway]

I have a Holley 600 cfm carb. It is marked as an 1850-3. They problem I am having is that it doesn't look like other 1850's and wanting to know what I have. This is a photo of what it seems like it should look like (finish not important):

And this is what it looks like:

What could I have on my hands? It appears I have a dual feed and dual metering block carb (which isn't matching the list number). Is this something that people upgrade often? Any help would be greatly appreciated. Also, what rebuild kit do I need to buy?

 

[monkeystash]

The one on the bottom is a 4150 double pumper. Is yours marked 1850-3 on the choke horn? Does yours have vacuum secondaries? Maybe an actual picture would be more helpful.

 

[rsalway]

Here are some pics:

 

[monkeystash]

You have a 4160, which is vacuum secondaries. 1850-3 is a model of a 4160. There is no secondary metering block, just a metering plate inside the secondary float bowl. It seems someone just replaced the float bowls making this a dual feed, versus the single feed with transfer tube as it came originally. Should make for a nice carb on a stock or mild 289 or 302.

 

[rsalway]

What rebuild kit do I get?

 

[66benchcoupe]

Get any kit for a 4160 but always use blue Holley gaskets for the bowls. The red Barry Grant gaskets stick unless you spray PAM on them (IMO, I'd rather leave the PAM in the kitchen where it belongs and use a gasket that needs no prep).

Robert

 

[rsalway]

Thanks!