Hi everyone, I am trying to find out if the body shell of a Cortina chassis based RV will fit on a Sierra based RV or visa versa. I have an RV which appears to be done using a lot of a MK4 Cortina but is definately using the gearbox, diff and rear end of a Sierra but I would like to use the RV shell from a Cortina based one as it has a roof. Can anyone help?