I'm putting Jegster Adjustable ladder bars on my hotrod. There 31.5" in length. Instructions say to mount them as far apart as possible, but also to use there ladder bar crossmember.. Being this won't be raced, I planned on fabricating my own crossmember. However, upon trying to fit everything, it seems like my chassis isn't wide enough, with the Explorer 8.8" rear end and the offet pumpkin it has.. If my chassis is 32.5" wide, where would be ideal placement for the bars inside the frame? I also see some hotrods running with ladders on the outside frame rails just like radius rods. Is that considered acceptable on a narrow frame street car?..