96" roadster chassis build NEEDTECH HELP!!!

i want to build a perimeter frame for connecting
a mustangII front end and the matching 4 link rear.
after its rolling a full cage and Z3 pannels will be
next goal.

i want a "mad max" finish, fast,loud,safe,no doors,
brutal suspension

do i use stock relationship angles for the running gear???

i assume they make DOM rectangular tubing?

anybody know of a similar roadster project????

wish this idiot luck thanx scott