About the resistor sizing I calculated for 14.4v the calculator says 16v to be safe. Just don't do 12v, alternators don't generate 12v. Also, use the smaller number in the Forward Voltage in the LED specs, (such as 1.8-2.0v) punch in 1.8 in the calculator.
EAP with 1/3 of the cold weather package. No block heater or TCS.