2500W rms on a regular basis is extremely difficult to achieve, unless you like listening to test tones. music is dynamic and most recording rarely have enough well recorded and mixed low end.
regardless, you'll most likely need at least one 300A HO alt, a bank of AGM batteries, and a few spools of 1/0 wire. solder your ring terminals, color code you wire, and take good care to properly fuse so you don't set your truck on fire.
monitor voltage constantly and ensure the system is able to maintain >13.5V while driving and listening at your desired levels. plan on spending a $1500 in electrical upgrades - good batteries and a good alt are expensive.