squarebore or spreadbore

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10-02-2003, 10:41 PM

Duke901

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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.

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10-02-2003, 11:47 PM

five7kid

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Car: 82 Berlinetta/57 Bel Air

Engine: LS1/LQ4

Transmission: 4L60E/4L80E

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

Spreadbore.

What are you trying to buy?

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10-02-2003, 11:56 PM

Duke901

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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.

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10-03-2003, 12:03 AM

Apeiron

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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.