I just bought a 96 bonneville which i havent recieved yet and i have a sub box 4 it. does anybody knw if a 30"x32"x17" box would fit in the trunk?

You have about 16" with the spare tire cover. Remove that and you could fit it. I fit a 32"W x 14"H x 15"D in there, no problem.

You could build a false floor like I did and chuck the spare. LOL I did this to get rid of the hump over the spare. My amp and sub would just not sit right. I did the same thing in my wifes Lumina and it looks much cleaner.