the question is...are the cabs all the same size whether i am looking at a 3100,3600,3800,6100 etc.? the fenders, hood on my 3600 are smaller than those on my 6100 of course but what about the cab. i need all new body rubber for the windshield, doors,etc. for the 6100. gotta stop the water from rushing into the cab. yes, the truck is outside in the elements for now. help as always is very much appreciated. thanks.