You reach the point of diminishing returns eventually, especially if you want to keep the street car aspect of it and don't have a lot of money to throw around. I would really think about punching holes in the door, might want to calculate what you will gain (ehh lose), before doing so.
The heavy hitters are things like the bumpers, brackets, etc. Hood is heavy too. The sky is the limit, really. You running a SB or BB?
