[HPCOBRA]

I am redoing an earlier build and about ready to put the dash back in. I am trying to decided if I should install a dash mounted RV mirror or a winshield mounted one. Give me your thoughts. If I am going to mount it to the dash, should I try to bond in a metal plate so tha the mirror has something to bolt thru to? If so how successful has others been installing this plate to the underside of the body when the body is already on the car. There is a small gap between the body and the cowl that holds the defroster duct. Thanks