Jeremiah, my dual 4150 top would only bolt on one way It looked like it would fit both ways when I was mocking it up, as in the picture, but one screw would not go in when I went to do the final assembly , I reverse it and they all went in
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
It looked like it would fit both ways when I was mocking it up, as in the picture, but one screw would not go in when I went to do the final assembly 
