They make 2bb to 4bbl adapters. Make it bolt right on.
Mr. Gasket Carburetor Adapter Kits 1933

 

 

Yes! It will.

 

 

I've been sneaky enough to actually put a 4bbl on a 2bbl intake if you just flip it over and get ingenious with the bolts. Works in a pinch.

 

My 1st pickup truck, IH with a 392. It had a 2 barrel carter on it with an adapter plate. The intake was for a 4 barrel. Do you have any tags or ID numbers on your carb. There's ways to look up how big of an engine it will work on. I have a Holley on my 312 that's rated to work on a 390. I believe the website is called Mike's Carb's. He has charts to help you.

 

The carb is a Holley 2300 350 cfm street avenger. I'll run it with the adapter until I find a 4-barrel in my price range. I'm married to an accountant, so my price range is usually about half as much as I want it to be.

Anybody have a preference for a 4-barrel on the edelbrock 2105? Thinking no more than 600-650 cfm. Truck has headers and dual exhaust with pertronix ignition. I like this Holley but may go for an edelbrock to match the intake. Or Autolite 4100?

 

 

A 600 Holley would be fine. Nothing fancy. The stock motor doesn't make enough power to need any more then that.
I ran a 750 Holley on a stock 352, but that was only because I had it. Never was able to run it hard enough to get the secondaries to even open. Around town, it ran fine.

 

A 350 CFM carb is fine for a stock motor IMHO. You sure it's not a 500 CFM Holley "super duece"? But note, after adding an intake and especially high flow exhaust, you should install richer jets in that Holley probably. Depends on what is in there now. After you get it all together as is, run it a few hundred miles. Including running it hard sometimes. Not that we ever do that. Then pull your plugs out and "read them". I'll bet they will show the engine is now running lean. Note, if you get spark knock now, stop and put in 2 sizes richer. Spark knock can burn holes in your pistons. Then do the above again.

 

I am not a NGK fan, but here is one of the charts available. I buy stictly Ford Motorcraft plugs for Fords.

 

Thank you very much for the advice. It's definitely a 350 cfm, I bought it new less than a year ago as I wasn't planning on any upgrades. Of course, I then developed an exhaust leak and it has spiraled from there $$$.

It's been running rich so I'll definitely be checking plugs and make sure to get it dialed in. The plan is to get a 4 bbl later this year, but since right now the truck is just used for runs to the beach to surf and the occasional date night, the 2 bbl will suit my needs for the time being.

 

A smaller carb will sometimes run richer then a BIG carb. The strange thing is the size of the venturi's has a lot to do with it. The bigger the venturi, the less vacuum at the carb at slower speed=draws less gas. A small venturi carb will actually have more vacuum(draw more fuel) making it run rich. Kind of a strange phenomenon, but explains how a small 350 cfm carb can run rich on a relatively large motor if it is not jetted correctly.