I am attempting to remove the windshield regulator on my 1938 truck. I can only get to one of the two attachment screws/nuts for the unit under the dash. Do I have to remove the entire cowl vent mechanism to get at this unit? I have one of the two screws/nuts loose but now I can't get it all the way off cuz I can't get access to the stove bolt head to finish getting the nut off. Second attachment site is even harder to get to. Any of you guys have any tips to help this frustrated HB CA stovebolter? Any help would be appreciated. Thanks