Yep, the ported sources works perfectly. Some folks don't understand how ported vacuum works. Basically, it only applies at light throttle/light load. The only real difference between full manifold vacuum, and ported, is that manifold vacuum will have a signal at idle or anytime the throttle plates are closed. Since the source location for a ported source is just above the leading edge of the primary throttle plates at idle, it is uncovered, or activated with the slightest movement of the throttle, and from there on up represents the same reading as any manifold source which is also below the throttle plates.....confused yet?......Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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