Gary, I brought back the other carb you wanted to check out. It is a C9AF-9510-U, List 4609. I have the can of misc. parts too.

 

Bill - I can ID every part in the pics. Skid of Holley, Carter, and Rochester. PM coming - when I get my inbox cleaned a bit.

 

James has a dual feed Holley sitting under his work bench.

 

Gary, you missed the Ford/Autolite/Motorcraft jets.

 

Yes, I did. Do those fit the 2100/2150/4300's? I wonder about the new Summit version of the 4300?

 

They fit 1100, 2100 from 1963 on, 2150, 4100 from 1963 on and 4300 but not 4300D. I thought Summit's Holley was a 4100 clone?

 

My mistake. I should have said 4100, not 4300.

 

There's not an aftermarket carburetor out there that is going to have the reliability and driveability of the Ford Autolite/Motorcraft 2100/2150 2V and 4100 4V. With features like the thermostatic hot air choke and annular discharge boosters, these carburetors are about as close as you can possibly get to fuel injection.

 

Lariat, that Holley is an OEM Ford for a 428 CJ.

 

Beat me to it, Bill. And the predecessor to the Eddy carbs, the Carters, were OEM on many a muscle car, such as Hemis and the Super Bee in my shop. As for reliability, while the Autolites are pretty reliable the Carter design is, in my opinion, more reliable as there are no diaphragms to split.

While I can't speak to the driveability of the 4100 I do know the 2100 and 2150 carbs are very driveable. I do like the hot-air choke, although an e-choke works well enough for me.

 

Unlike the OEM Holley and the Carter carburetors, the Autolite 2100/Motorcraft 2150 2V and the Autolite 4100 4V are Ford designed carburetors. The others did not use a thermostatic choke nor the annular discharge boosters. Those features were designed by FORD engineers back in the late 1950s and are still superior to anything aftermarket carburetors have come up with. The thermostatic "hot air" choke gives the engine just the right amount of choke it needs under all conditions for better driveability, and the annular boosters discharges fuel almost as well as modern fuel injection. Holley actually bought the rights to the annular discharge booster design from Ford when Ford got out of the carburetor business in the 1980s.

The Autolite 4100 is essentially a 4-barrel version of the Autolite 2100/Motorcraft 2150 2-barrel carburetors.

 

I have one of those Summit carbs. And it has the same booster cluster(S) as the Autolite 4100. Only real differences are it uses all common Holley tuning parts, has center hung floats from the top and uses the typical Holley acclerator pump. Runs like a clock. It's a Holley 4010 that's had the bugs worked out of it, is what it really is.

 

But it doesn't have a hot-air choke - right? Just electric?

 

I thought post one was "no discussion of Holley's, I'm not even going to consider one"?
Here we are on page (whatever, damn this mobile site) and its STILL going on...

 

Good point, Jim. But, to be accurate, I think the statement was "Holley-style" as I was aware that Holley has purchased BG and therefore the Street Demon is technically a Holley. So I didn't want to rule it out.

But, I do wonder what all the hoopla is about Holleys. So I am curious to see how Bill's carb would do. Also, it fits the build theme of the truck - as would a 4100. So, do I have to take 20 lashes?