Stock Intake with Clifford Headers

You only need the heat in cold weather 40* or colder. That's if you plan on driving it in the winter. I ran mine 12 months out of the year.Clifford headers and intake with no heater. Yes we see low 30's even in the 20's in southern Nevada.Look on the head by the valve cover you will find a raised pad with a threaded boss.You can install a throttle return bracket there with a spring to your carb. I did it on my 63 Valiant.
I ran a 195* thermostat.