Man-wagon's are awesome, here's a great example of how to build one! Photo shoot by The Beard.
Renntech Modifications include:

Custom built 55K motor by RENNtech
660 HP / 740 LB-FT @ crank
Upgraded pistons and connecting rods for higher boost
Ported and polished heads
SLR camshafts
Crankshaft pulley
Stainless Steel Long tube headers, 200 cell cats
Custom ECU tune
Carbon fiber airbox w/ 82mm throttle body
High Flow Intercooler Pump kit
100% Locking Differential
Transmission Upgrade
Lowering Module w/ toe links
Performance Brake Package 3, 15.2” front/14.2” rear 2 pc rotors

Wheel setup by ADV.1 / Wheelsboutique:
ADV08 Track Spec / 2013
20x9.0 / 20x10.5
brushed center / polished lip

 

Love the wagon. Got any interior shots?

 

so much win

 

here's a great example of how to spend a boat load of $$$ on a station wagon.