I want to build a new project im wanting a 03-07 scsb chevy with a 5.3, i have found a really nice 07 classic body low miled, only thing im concerned about is its 4x4 i was wondering if that will affect my power and if so how much. my mods will be headers, tuned, wipple charger, cam. should i buy the 4x4 or hold for a 2wd please help asap