carb replacement

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Jun 25, 2022 | 12:44 PM

VinceP

Thread Starter

Racer

Joined: Jan 2008

Posts: 291

Likes: 17

From: Woodinville Wa

carb replacement

I have a 1963 swc 300 hp I am trouble with the stock carb I called around to see about someone to rebuilt it.they want $300 I though that was hi
I was wondering what would be a good replacement carb that would fit the manifold an fit the stock aircleaner thanks Vince

Jun 25, 2022 | 01:44 PM

TJsBeer

Racer

Joined: Jan 2015

Posts: 256

Likes: 200

From: Valley Forge, PA

I bought a 4160 direct from Holley.
Worked perfect out of the box with minimal adjustments including dwell and timing.

Jun 25, 2022 | 03:01 PM

rick charles

Racer

Joined: Apr 2007

Posts: 492

Likes: 3

From: AUBURN NY

Carb.

If It Is The Org. ( 3461 S ) Spend The Money ,,,,,,,,,,,,,,,,,,,,,,,

Jun 25, 2022 | 03:12 PM

barkingrats

1967 Pedal Car Champion

Joined: Mar 2020

Posts: 9,140

Likes: 4,249

From: US-PNW

Post some photos of the carb and any numbering stamps on it. If it's a '63 Corvette carb then it's probably worth getting rebuilt; you're going to spend 2x that for a new replacement.

Jun 25, 2022 | 04:10 PM

leif.anderson93

Le Mans Master

Joined: Feb 2014

Posts: 8,946

Likes: 5,487

From: Richardson Texas

If it is truly the original carb, spending the $300 for a proper rebuild to factory specs is the correct decision. Chump change in the grand scheme of things.

Jun 25, 2022 | 10:49 PM

mblake101

Burning Brakes

Joined: Mar 2010

Posts: 1,110

Likes: 276

From: Kyle, Texas

2024 C2 of the Year Finalist - Unmodified

A 3461s Carter AFB is a high value carb and correct for both the 300 and 340 hp 63’s. If yours does not have that number and has a stock intake, a AFB 3721 is a lessor expensive replacement almost equal performance. If you do have a 3461s, have it refurbished. It will be worth it.

Jun 26, 2022 | 07:36 AM

R66

Le Mans Master

Joined: Nov 2015

Posts: 7,479

Likes: 2,648

From: Really Central IL Illinois

Don't know for sure, but I don't think your 63 air cleaner will fit on a new Holley or Edlebrock. A $300 rebuild will save you a couple of hundred there.

Jun 26, 2022 | 12:57 PM

SWCDuke

Race Director

Joined: May 2000

Posts: 12,712

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Quote:

Originally Posted by VinceP

Give us some detail on why you think the carb needs rebuilding. How is it misbehaving? The AFB is pretty reliable and trouble proof. The biggest problem is the choke system, mainly the choke vacuum break piston getting dirty and sticky, so choke operation is impaired. They are pretty simple to rebuild, and the procedure is in your 1963 Corvette Shop Manual. When they get over 100K miles the throttle shaft bores are usually worn enough that the idle speed is inconsistent. At that point you need a pro with plenty of experience who can rebush the throttle shaft bores.

For those of you who don't know the Holley bolt pattern is different that the AFB, and the air horn is different diameter, so no Holley is a bolt on to an engine originally equipped with an AFB nor is an Edelbrock "AFB" combatible due to a different air horn diameter. I'm not sure about the bolt pattern.

In almost all cases one is better off doing a full restoration of an AFB rather than coming up with some Mickey Mouse alterantive.

Duke