63 and 64,65 intake

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Apr 30, 2026 | 01:25 PM

Mitch03Z06

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From: Central Md

63 and 64,65 intake

Can someone tell me what the differences are between the 63 340 hp manifold, and the 64 365 hp manifold?

Apr 30, 2026 | 02:18 PM

3030cam

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The '63 used a Carter AFB while the '64 - '65 used a Holley. Not sure if there are other differences.

Apr 30, 2026 | 02:22 PM

JIMNAN

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From: CALIFORNIA

St. Jude Donor '25

Quote:

Originally Posted by Mitch03Z06

Can someone tell me what the differences are between the 63 340 hp manifold, and the 64 365 hp manifold?

63 340 is aluminum designed for the AFB type carburetor. 3794129 is the casing number.
64-65 is aluminum designed for the Holley type carburetor. 3844461 is the casting number. 365 HP in 64-65 and 350 HP in 65.

Apr 30, 2026 | 02:53 PM

Mitch03Z06

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From: Central Md

Thank you all

Apr 30, 2026 | 03:09 PM

Mitch03Z06

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How is PCV valve routed on the 64 365 hp?

Apr 30, 2026 | 04:40 PM

lucky131969

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From: Dyer, IN

Quote:

Originally Posted by Mitch03Z06

How is PCV valve routed on the 64 365 hp?

So you want to install a PCV valve instead of the controlled fitting on the carb?

Apr 30, 2026 | 04:42 PM

Nowhere Man

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Quote:

Originally Posted by Mitch03Z06

How is PCV valve routed on the 64 365 hp?

on the side of the carb is a a fitting with what I recall to be a .035 orifice that restricts the vacuum to the oil fill tube

May 1, 2026 | 11:33 AM

Mitch03Z06

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From: Central Md

Maybe I should explain what I am trying to do. I have a 63 convertible without the original block. It has the correct casting number, and approximate date code, but it’s a T block not an F block. When I purchased the car it had a quadrajet, and a random Chevy cast iron manifold. The paper work I got with the car shows the engine was rebuilt to the 340 HP specs that the car was built with. Since I was 19 I have always wanted a 327/365 hp c2. I currently have an aftermarket 600 CFM Holley clone ( will get a 2818 when I have the $), 64 aluminum intake, and 64 air cleaner. I am looking for diagrams, pictures etc. showing how the crankcase is vented. I have also added a 67 dual master cylinder and power brake booster. So I need the fittings to connect the booster. I hope I may this clear. Thanks in advance, Mitch