Possible big three upgrade

[Robert 2001 10+ year member]

Ive been considering doing a big three install on my truck its a 2001 dodge 1500 ext cab im running 2 l7 12s at around 1200 rms at 1 ohm stock fusing for alt is 140 a stock to alt and ground are 4 ga currently I haave no dimming or voltage drops below 12.4 v watt benifit if any would I receive by doing this I dont plan on going any bigger with the system as I need my back seats would big three really do anything for this application? Thanks for the input

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