And that completes the connection. When The Magician and Rockford Files premiered, there were only three commercial networks, so the launch of a new show was an even bigger deal than it is now. They were promoted together and launched consecutively to each other with a slight plot crossover. I was pretty stoked to watch them and as a ten year old, I really thought The Magician, with the vigilante entertainer using theatrical magic and slight of hand to bag criminals then jet off in his private Boeing jetliner to escape would be the TV hit.
Rockford I thought was just another PI show on the heals of Mannix. But then, at that age, I didn't know the popularity of James Garner either.
EDIT: Hmm my (unreliable) source has 853 OKG as Rockford's dad's truck.