Got my "punched" 194 equipped Nova running much better since heating the Clifford intake and the 390 Holley is much smoother under a load since replacing the power valve to a 3.5 (was a 6.5). Gas mileage has increased to 24 mpg hwy. I am currently using the vacuum port located on the inboard/rh side upper tube near the rear of the float bowl for vacuum advance to the distributor. This Holley has many ports that are capped. Is this the BEST place to draw vacuum from?
