Too much intake? RPM Air Gap on a stocker 360

A factory 340 or 360 four barrel cast iron manifold. Those are spread bore, so probably would have to fabricate an adapter for it. If you could find a suitable adapter for the 360 TBI intake, it would work well. One last question. Automatic or manual truck, cruise control equipped? If it’s equipped with an automatic, it’s definitely easier to swap a factory four barrel intake to than to modify the transmission throttle pressure linkage to fit with a spacer. You’ll also need the Holley Chrysler throttle lever adapter Either way to correct the throttle lever ratio.