I scratch build all of my antennas now Bill. I just use pieces of sprue that I heat, stretch & glue together & then shoot them with Alclad. As far as the heater hoses go, I won't pretend to know all of the ins & outs of early 60s Chrysler cooling systems, but all of the reference photos I saw had that "return" hose I guess you could call it, so to be accurate, I added one. Steve