66 - 273

Keep the heads, they flow the best for what you want. Get a competition valve job, and use stainless steel exhaust valves. Use a Custom Racer Brown cam or an Isky E-4 will work nice for an off the shelf cam. Skip the headers, just run the 66 Commando 2 1/2 exhaust with your manifolds. Delete the heat valve on the passenger side manifold. Stock 4 barrel manifold and carb or aftermarket 273 or 318 intake with a Street Demon 650 cfm carb.