Maybe...
Most intake manifolds made for the Carter AFB bolt pattern are pretty dated and
better stuff can be had real cheap. If it is drilled for the very old WCFB type
carbs it is probably so old as to be a collector's item for someone restoring
an old chevy so might be worth more to them than a new manifold.
Dave Dahlgren
Dick J wrote:
> Some four barrel manifolds (and spacers) have four holes to match the
>venturies on the carburetor. Others have one large square hole which includes
>all four venturies of the carburetor. What is the difference in these two
>arrangments? I have an older intake manifold that is drilled for the early
>small bolt pattern four barrels, but I want to adapt the larger bore, bigger
>bolt pattern carburetor. Should I machine out the four small venturies to the
>size of the bigger carburetor's butterflies, or should I just machine out the
>entire opening in the intake to match the size of the later carburetor gaskets
>and spacers which have one large square inlet? My theory is that the four
>smaller venturies give better bottom end response, and the larger square hole
>gives better top end performance. Am I right or wrong?
>
>
>
> Dick J
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