squarebore or spreadbore

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Oct 2, 2003 | 10:41 PM

Duke901

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Joined: Jul 2001

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From: SYLVANIA,OHIO,USA

Car: 89 Formula

squarebore or spreadbore

Are the stock chevy intakes from 1974 through 1978 squarebore or spreadbore. Why i ask is because im trying to buy a new carb for my stock 350 that has a Q-jet on it now.

Oct 2, 2003 | 11:47 PM

five7kid

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Posts: 43,187

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From: Littleton, CO USA

Car: 82 Berlinetta/57 Bel Air

Engine: L92/LQ4 (both w/4" stroke)

Transmission: 4L80E/4L80E

Axle/Gears: 12B-3.73/9"-3.89

Spreadbore.

What are you trying to buy?

Oct 2, 2003 | 11:56 PM

Duke901

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Senior Member

Joined: Jul 2001

Posts: 518

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From: SYLVANIA,OHIO,USA

Car: 89 Formula

I was looking at the edelbrock carbs, but i think those are all square bore. What about holley? are they spread or square.

Oct 3, 2003 | 12:03 AM

Apeiron

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Joined: Jan 2000

Posts: 20,981

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From: Mercedes Norte, Heredia, Costa Rica

Car: 1984 Z28 Hardtop

Engine: 383 Carb

Transmission: 4L60

Axle/Gears: 3.54 Dana 44

Quote:

Originally posted by Duke901
What about holley? are they spread or square.

Square mostly, but Holley has a few spreadbore carbs for replacing OE Quadrajets and Thermoquads. Another alternative would be an Edelbrock Quadrajet.