Just how quick were the 273 Commando's in the Quarter-Mile.

More 'Back-in-the-Day' Tricks

Performance Tips, without getting into the Engine

Remove the Battery from the Engine Compartment.

Install a 'Heavy-Duty' Battery in the trunk compartment, over the back right rear-end.

'Drag-Shocks' 50/50 {Rear Shocks}

Remove Front Sway-Bar

Fuel Cool-Can

Stewart-Warner Electric Fuel Pump

Air Conditioning Water-Pump

7-Blade Fan

Viscous Fan-Drive

Heat-Riser {3/4"} > between Intake Manifold and Carburetor

Heat Cross-Over Copper Shield {between Intake Manifold and Cylinder Head}

Carburetor Velocity Stack

Carter AFB Carburetor {One size up Secondary Jets, and re-set Pump Shots}
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While it didn't look like a lot, those 'Performance Tips' would knock off nearly
4/10's off a good running '273 Commando'.