Could the stock 97 max alt handle two yellow tops for my system?

Also I think i finally made up my mind and im going to get 2 15" L7's and a Hifonics BXI2005d amp but my question is how big of a box should i get I was think of a 8^3 box.37hz(saw the same setup ut with a bx1500 and it had ALOT of flex)

 

personally i would go aftermarket alternator. if your alt cant charge 2 batteries sufficiently it will burn up rather quick as it will constantly be cycling