I agree with the others, I have never seen red heater hoses from the factory on any GM car.
Kerry, forgive me if you have already addressed these items.
Since you are talking about heater hoses you might want to check the condition of this grommet, that goes over one of the heater core tubes. After 45 years they deteriorate. Mine was falling apart. With the inner fender out is a great time to replace it. I noticed the price has gone up, $30.00. AMES, FP359N.
IMG_2913 by
Lawrence Alexander, on Flickr
These style hose clamps are like what was originally used by the factory. I think they provide a more even clamping force than the worm gear clamps. Only down side is they really can't be reused. Also from AMES, 2 each FP253 and FP254.
IMG_2915 by
Lawrence Alexander, on Flickr