Hi Parker,

If you know that you have good circulation and hopefully no combustion leaks, and your ign. timing is correct, their could be the possiability that your water pump is sucking air into the cooling system from a bad shaft/seal...You might read the thread.."Radiator/water level?" in search block above.

Where Are You From? Leavenworth, WA / Yuma, AZ

Do You own a car built by Durant? Several