Jeff : As always, thanks for your input. After reading your answer, I was going to print out a copy of the Illustration showing the Heater Hoses from my 67 MPC, and note that they were the "red stripe" type. When I went to that section, the adjoining text notes " C7AZ-18472-A, 5/8" I.D. - red stripe". Guess I should have checked that first, but many times, the "spoken word" is better than the "printed" one.
Bob