The Stovebolt Site Forums The Parking Lot '60-'66 Trucks what to do about my overheating issues?

12" is pretty far away without a shroud. It does kind of sound like you may have another problem because it heats up on cool morning? . After you get a 3" extension (if that's what you do), you will have 9" to radiator. The shroud should be attached tight at radiator and just cover about half the fan. Be sure your water pump is working full flow, no collapsed hose and timing is correct.