Just bought one-I think I like it. Loaded with chrome and lights, looks nice, 1985, bought it from a 75 year old man for $3500. I changed all the fluids, but, over about 48 mph it picks up a metallic rattling sound-it´s not the shifter-sounds like from down in front of the engine. It´s not a knock, it´s the bb thing...any thoughts?