Best intake manifold and carburetor for a 273

lemondana said

I'm going to try a Holley Street Dominator and an electric choke (800 ThermoQuad). I'm good as long as it works ok and makes a lot of noise. On my stock 273-2bbl Dart. Anytime I drive any of my cars that have a Thermoquad, I have to hear it just once!

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I’ll be a bummer and tell you what you’ll experience.

Loss of low end torque
A gain in high rpm HP
Camshaft dependent, the two intakes will balance out around the same rpm area of approximately 4000/4500
You’ll pick up a usable 500 rpm up top and hang onto the power to 5500.

To make the most of this intake, a gear reduction and extra stall in the converter (and matching the camshaft of replaced) will help abate low end torque loss, get you into the camshaft power band quicker.