There is an option- the GMC 302 intake manifold is set up for a two barrel carb and bolts right up to your 270. There are two bolt patterns. One has three bolts to fit the Holley AA-1 (Stromberg 97 style). The other has four bolts and will fit a Rochester 2GC style. Some (maybe all?) of the 302's don't use vacuum advance, but you can drill the base of the carb and add it if your carb doesn't have it.


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