there are very good alternators out there there isnt one better than the other just ones more exspensive, batteries i would get either and optima, kinetik, or a powermaster battery, if you want a cheap way just go with the big three or the capacfitor, if you have the money i would get an alternator and put a better battery with more cranking amps in the front, but you dont have to run alternator or a cap, you could just put an extra battery in the back and run power wire off the stock alt and straight back to that battery and you will be fine