I HAVE A '78 THAT HAS HD LEAF SPRINGS, DUAL BATTERIES, ROLL BAR, HIGH OUTPUT HEAT, ALL FACTORY. I'VE BEEN TOLD THEY ONLY PRODUCED SO MANY AND ALL WERE SHIPPED NORTH, (HENCE THE ARCTIC), FOR SALES. ANYONE KNOW OR HEARD OF THIS? I CAN'T SAY I KNOW TOO MUCH ABOUT THESE TRUCKS.