Supposedly a four hole or split spacer will help cure this from a standpoint of the exhaust interfering with carb signaling, unless you're running a single-plane intake or a dual-plane with the divider cut down.
1967 Dodge Coronet Deluxe station wagon
1.03" T-bars, QA1 arms/rods, Cordoba/GM Metric/Volare brake & knuckle, XHDs, Hellwig rear sway, 318 Magnum w/ air gap, 727, 3.23s
