i think you're approaching this from an obtuse angle. first of all worrying about or trying to get to a 50/50 weight distribution in any car that is not a dedicated race car is an endeavor of foolishness.
second of all, think about all the peripherals needed to support a romping stomping machine: you'll need subframe connectors and body bracing, which is a known entity. but people don't take into consideration that a full road race oil pan weighs significantly more than a stock pan, as does the extra oil you'll have on board for the oil cooler, and hopefully your accusump, then you've got the fuel bits, plus all that AN line, remote mount filter(s), and plumbing.
on a race car you can, to a point, pick and choose where to move that weight. with a "street" car you're not really afforded that luxury.
you can turn a cucumber into a pickle, but you can't turn a pickle back into a cucumber; so sometimes it's just better to make relish with it.