Report Heater core removal in 1963-64 Avanti Posted August 19, 2012 The job is reletively straight foward. It's all done under the dash on the passengers side of course.. There is enough room to work under there unless your a really big guy ! Insure that the molded hoses are in good shape. If you need to replace them, take care to make sure you don't kink the new hoses as the formed bends were not positioned as well as the originals were! At least on the ones that I bought ! . When you take the core to a radiator repair shop...tell him NOT to paint the core and get a can of the special radiaor paint from "Eastwood Products",(or equivolent) It will not insulate the core like the radiator repair shops paint will !