Outer Limits 4x4 Board

Hi I going to make and exo cage for my ute mid wheel base cruiser and am after any advise on what to do and what not to do. Is there any hidden things I need to factor in? As most of you already no the hole top of the cab is unbolteble and I am hoping I can construct it so in can be removed but still very strong. I have ridiculously strong side steps to attach it to. Any ideas or advise would be greatly appreciated.

Thanks Nathan

i have an 84 MQ and the roof is sorta the same as FRP top i think you've got. I have an exo cage and can still have the roof on. there is a x brace that is removeable.