I currently have two 53 wagons. One is a Roadmaster and one is an estate wagon. They each have different colored heater hoses. One has red hose and the other has blue. I have not seen this, ever, I thought the heater hose was always black??? Also, the estate wagon has a two bbl carb with just the regular round air cleaner, is this correct or should it be a 4 bbl? Thanks, tomb.