1970 Z28 / LT-1 3/8" Fuel Hose
 

Looking for 3/8" fuel hose for my 70Z project with the correct ink markings and have not been able to find anything available at my usual go-to resources. Here's the best photo I can find from the 1100 Mile 70 Z28 formerly owned by Charley L. The ink markings appear to be GM followed by a square box outline....similar to markings I've seen on heater hoses of the era. Any help or leads would be appreciated.