Red...I have a cap..its a 14..I was told that if my Radiator is original..or old (55 3/4) I need to get a 4-7 cap..My Radiator..I do not think is original...It has a N-78 ...does that mean it is a 1978? I guess my Question is should I go to a 4 thru7 cap? MIke G.
