on the astro i did with a 4.3L we set in two 150 amp alts and left the stock 100 in as well. as far as the extra goes i say pull the A/C condensor and put in a nice 150 or 160 single wire semi alt (about 150-160 bux) and all will be good in the world for you.

 

hifonics XXV Sampson
1 X 8000 RMS @ 1 Ohms
that wount be till next years time shes a little costly dono what im doing for mids and highs yet.

 

alright, well i look forward to seeing it