[76HighSierra]

Also, you didn't need the adapter plate. The Edelbrock performer carbs are drilled with both squarebore and spreadbore patterns. Just use a Rochester Quadrajet gasket and use the inner bolt holes. I've done it a few times with success. If you were dealing with an "ultimate performance" engine, a disruption may be created by the somewhat poor transition between the squarebore carb and the spreadbore manifold, but in a realitively stock engine, it wouldn't make much difference. At least it doesn't with aftermarket spreadbore manifolds.