3754505, 3788191, 3777482, 3827368, 3827366 and 3906616 are numbers seen on my NOS Radiator hoses, found in my basement box 91. These and others were purchased at a dealer in the 1970s. Use your early GM Corvette parts book. or call me to find what you want. for ex: 3906616 is an UPPER INLET RAD. HOSE, 66-67 427s $50 each or 5 for $150.