I can only speak from personal experience of using a Q-jet on a Offy manifold. They have a square bore in the center of the bolt-down holes and must use an adapter plate to actually connect the carb to the manifold. Using a Q-jet requires another additional adapter. Those things have sloped sides in order to make the spreadbore narrow down to the square bore. On a 6-cylinder, that spells death to proper fuel distribution. The sloped sides cause the air to turn extra corners and induces too much turbulence.
If the Clifford manifold is available with a large enough hole to not require the use of an adapter from spread to square, then go ahead and try it. Otherwise, don't bother. Hope this helps your decision.
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David
newbie #4153
