Have you ever taken a close look at the HMMWV. In order to accomplish a complex drive line the originators of this vehicle. ( I think it was originally a crew of rodders in Utah/Nevada back in the mid/late '60s, these guys were using the original MOPAR full time transfer) the entire drive assembly is in a tunnel, with the seats off to the side of the tunnel. Makes for great ground clearance & almost unlimited power transfer to all 4 wheels. Good luck & have fun! BTW Happy Easter!
John v L