i have a 91 s10 ext cab. I have a kenwood excelon deck and i Rocford 200 watt amp (that pushes 320 watts) and a rocford he 10 inch sub. my stock alternator recently went out and i purchased a remaunfactured one. but it went out also. now i have another remanufatcured one. but i called around and was told my system could be causing this prob(they said older GM alternators what this problem) they say ill need a proformance 200+ watt alternator. this is very expensive. what other alternatives so i have so i can have my bumps back? (and still be in motion) HELP? can i get another small battery or something?