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is this spreadbore or squarebore

811 Views 2 Replies 3 Participants Last post by  56owner
I was told it was spreadbore but it kinda looks like a squarebore. Then again it looks a bit different then my square bore on my 56...


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its a square bore

Even though the secondairy throttle plates are larger than the primary that is still a square bore carb. Spread bores like the Rochester Qjet Carter thermoquad or the holley spread bore have very small primary and very large secondairy throttle plates. Randall

The picture you posted is a squarebore. Spreadbore carbs have 2 small primary bores and 2 large (2.25 in) secondarys.
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