Actually no. The alt doesn't pull any more than a few HP, it isn't physically possible. Simple math: 1 HP = 746 watts. This equals 62 amps at 12 volts. 186 amps = 3 HP at the crankshaft. You will *need* at least 2/0 welding cable all around in order to actually get that much power out of a 186 amp alt. Like I said, check your cable size first and how good are your connections. Before you spend big money, get your total resistance as low as humanly possible.
BTW this applies even more for guys with winches.
***--- Wrecking Crew member ---***
"I've prolly been around longer than you think"