Some road trip stories take a while to come together. This one took 23 years—and 820 miles in a single day. A 400-Mile Mission It started early—around 6 a.m.—with a road trip to Pittsburgh and the Steel City Con. The goal? Simple: get Kent McCord to sign a childhood Adam-12 lunchbox. But this wasn’t just another autograph stop. This was finishing something that started more than two decades ago. Back to First Grade The lunchbox goes all the way back to 1974. First grade. Heather Hills. Packed with PB&J, a thermos of tomato soup, and whatever made it through the day. And on the front? Adam-12. At the time, it wasn’t nostalgia.…