I remember those old 4-jets. I bought a 68 GTO that had one of those retrofitted on it. I ended up taking it off and putting on an AFB because it wouldn't keep from flooding the engine. As long as you can bolt it down on the manifold, and the carb is sound, then it should work great.
However you do it, get some heat under that manifold. Engine warm-up is not the issue. It all revolves around fuel atomization / vaporization / CONDENSATION problems in the manifold directly under the carb. Gasoline coming out of the venturi nozzle is in very small droplets. There must be enough heat in the manifold to vaporize it so it can burn in the cylinders. If you don't have heat right away, the physical reality of the air becoming colder as it goes through the carb will cause some of the gas to collect in a puddle in the manifold (flooding). It's nothing but thermodynamics in action. The air has to become colder because there is a big pressure drop across the throttle plate. If you are only operating the engine at wide open throttle, then the pressure drop, and the accompanying temperature drop, are minimal. In addition, the velocity of the airfuel mixture is high enough that it has no chance to stagnate and puddle out. That's why you can get away with no heat on a drag race motor but not a street engine.
Call Clifford and see what you can find to help the issue. And good luck with your project!
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David
newbie #4153
