Hartson's! That's a name I haven't heard in YEARS! I remember the ambulance "station" on I-8 between El Cajon and La Mesa. As a kid I remember listening to El Cajon FD pre-Heartland days on a rotary tunable Radio Shack radio I had. The El Cajon medic was "4391" and the chiefs/staff using 43xx but everything else was Engine/Truck - Back in the ALF days. Then at some point the Ford C-Series Engine 6 became Rescue 6 ... Ah the good ol' days when you could listen to traffic on a tunable radio