Where is the best location to install a Fulton visor dog bone on door jamb on my 46 Chevy 1/2 ton pu. I tried on the upper front edge jamb and dog bone fits well but visor sits too low on window. Tried putting dog bone further back at curve of jamb but two legs on bone doesn't fit curve of jam. Does any one have a Fulton visors installed on there truck that can give me some advise?