1967 273 V8 change to 6-pack carbs

64-65 273's had the angled manifold bolts similar to the magnums. That was changed in 66 to the standard angle found today. As far as a six pac, way too overkill fo that motor. Total cfm at WOT at around 1150 plus. There will be an intake head mismatch which could result in a massive vacume leak. the 273 haeds flow an average of about 151 cfm at .450. Go with the duel 4 setup. You can still get the manifold that fits the 273 heads (smaller ports) from Offy. Some of the D/darts were run with the duel 4's