Trying to help a local guy out who doesn't know about this site. He is looking for a heater hose elbow for his 69 351W. On the Scott Drake site they list off part number DOAZ-18599-C for a 70-73 351/390. I don't understand that as there was no 390 in a Mustang between 70-73. They also have part number DOAZ-18599-A but listed as 69-73 351 C. Looking at the picture of parts on the Drake site they look the same except the finishes are listed off as Chrome and Zinc. Can anyone shed some light? He wants one that looks authentic. Thanks