63 Carb. to Manifold gasket

[Harry S.]

I should know better but I'm putting the WCFB back on for the 99th time.

The gasket on the right or left?

Thanks

[Frank D.]

Re: 63 Carb. to Manifold gasket

The one on the left...its two holes match the holes in the cast iron intake on a 63 250hp mill....there is no "hot slot" that would require the gasket on the right.

My holes have plugs in the picture attached, but you get the idea...

[Timothy B.]

Re: 63 Carb. to Manifold gasket

Frank,

If the 250hp engine uses the stainless shield I believe the gasket on the right would be the correct part to use. The main purpose of the heat is to warm the primary throttle bore area so no icing occurs.

[Frank D.]

Re: 63 Carb. to Manifold gasket

The WCFB on the 250hp base engine does not have the metal baffle according to the AIM.

The 300hp and 340hp engines share the same AFB carb yet one uses the metal baffle and the other does not...

This is clearly called out in Nolands C2 Volumne Retoration/Technical Guide...and the AIM...

[Richard G.]

Re: 63 Carb. to Manifold gasket

Harry;
If you go to docrebuild;

https://shop.docrebuild.com/1962-1965CorvetteCarbGasketReplacesGM3798352.aspx

He has a copy of the print for this gasket. Doc also included this note;
The manifold has 2 round holes on the passenger’s side & a single Siamese oval hole on the driver’s side. If you want this part to match your 340 intake manifold, simply cut out the space between the 2 left side round holes. 1962 1963

I believe this is also correct for your application.

https://www.ebay.com/itm/NOS-62-63-Corvette-Carter-AFB-327-Carburetor-Base-Gasket-3798352-1962-1963/142676384160?hash=item21382cd9a0:g:mukAAOSwHu5cAaov

Here is another that would work, sans the tab;
Carburetor Mounting Gasket Fel-Pro 9525. $6 and free shipping.

https://www.ebay.com/itm/Carburetor-Mounting-Gasket-Fel-Pro-9525/332330073516?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20131003132420%26meid%3D0820f3f05c434e308bea983d2725aac8%26pid%3D100005%26rk%3D2%26rkt%3D12%26mehot%3Dlo%26sd%3D283696508341%26itm%3D332330073516%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100005.m1851

I went through this same scenario.
I ended up purchasing one from the Doc even though he is not on my "go to" list.
The gaskets included in the AFB rebuild kit were incorrect for the aluminum manifold applications.
Although I have the gasket tab on my 340hp I am unsure if the judges noticed it or not.
Just throwing some options out there, may or may not be correct. Some input from a judge would be needed.

I have observed used 340 intakes, for sale, with lots of corrosion on the carburetor mounting flange. The corrosion matched the incorrect carb gasket outline.

Rick

[Frank D.]

Re: 63 Carb. to Manifold gasket

Harry is installing a WCFB carb, which only came on the 63 base 250hp motor...

[Harry S.]

Re: 63 Carb. to Manifold gasket

Thanks all, I must have had this WCFB on/off 20 times in the last 3 months. Choke, floats, clogged and everything else age can bring to a 57 year old carb. It should be OK now. If it stops snowing today and I can move some cars around I get it installed and let it run.

Cheers

[Frank D.]

Re: 63 Carb. to Manifold gasket

The 63 WCFB 3500S or 3501S base looks like this (first picture); you can prob get away with either gasket, I use the one on the left; still; there is no metal baffle... Either gasket will let hot air into that channel unless your manifold holes are plugged (like mine shown above)...

If the car is staying in New Hampshire you prob want those intake holes open (unlike me down here in Florida!)

However, yes, if you don't use the baffle when its called out as a requirement with the AFB you'll get corrosion like this (second picture).
The AIM cites the need for the metal baffle on the L-75 motor and not on the L-76, which I find interesting (third picture).

[Edward J.]

Re: 63 Carb. to Manifold gasket

Harry I will look and see if I or bob have a gasket and bring to our general meeting.

[Harry S.]

Re: 63 Carb. to Manifold gasket

Harry I will look and see if I or bob have a gasket and bring to our general meeting.

Ed, thanks. I have plenty of gaskets.

[Harry S.]

Re: 63 Carb. to Manifold gasket

As soon as it gets warmer than 9 degrees here I'll give it a go.

[Timothy B.]

Re: 63 Carb. to Manifold gasket

Harry,

Is that the gasket that's called out for your WCFB in your picture above? I was always under the impression the gasket matched the intake manifold holes.

[Harry S.]

Re: 63 Carb. to Manifold gasket

Harry,

Is that the gasket that's called out for your WCFB in your picture above? I was always under the impression the gasket matched the intake manifold holes.

Tim, that's the one called for.

[Frank D.]

Re: 63 Carb. to Manifold gasket

As I said - that's the one I've used for 5 years now....

[Harry S.]

Re: 63 Carb. to Manifold gasket

Part number = 3743282