Haven't done the big three yet cause I'm startin from scratch on this car. I'm gonna do 0gauge stinger wire, kinetik hc1400 for my batt. (or maybe the hc1800), alt. upgrade is gonna come soon after that.I'm gonna put a 10 farad stinger cap on as well. I drive an 89' chevy caprice classic so box dimensions aren't really a problem except for the height. Gonna have a prefab box until I can get my custom one made. Any suggestions for the alt and box demensions would be great as I'm fairly new at this. Everything in your list sounds cool just dont throw that cap in there, if you already bought it then sell it and use it to buy the stuff you really need. Would the cap be useless with these upgrades?