Another D/Dart 275/273 question???

Toolmanmike,

Correct, the factory cast iron 273 intake manifold.

1 7/16" Primary and 1 9/16" Secondary throttle-bore hole openings.

The single-plane, low-rise intake had narrow runners, which were good for
low-end torque. They worked well with the automatic transmission cars.

1965 #2465726
1966 #2536770
1967 #2536563

Heavy little guys, at approximately 38 lbs.