Well you'll need bout 6500 watts of electrical power from somewhere, so look at a 250+ alternator. Battery wise, i'd say two good 100Ah deep cycles, Powermaster'd be my pick. With all of that you don't really need a capacitor, just good as they reduce voltage drop.
Oh and Big 3 with all that, Chassis to -ve, engine to -ve, +ve to alt, but you probs already know dat.