i have 4 320amp iraggi alternators. Best amp for price ratio.
each of my alts bench more than 320 amps at 2-2.5k rpms
a 220+ amp alt
big 3 is a must!
and a agm battery. you shouldnt have any voltage issues.
i cold start at 15.3 and once warm the truck sits about 14.8.
i had 2 powerbastard alts prior to this setup (that i bought from a member here, sold his truck through) and they didnt bench 250amp and charged at 14.3
my current setup also has a vcm which is usually set to 15.1 for demo's or 14.9 daily which isnt much different from where they usually sit at 14.8 anyways... full tilt i drop to 14 with 12-13k rms, that was only with 4 batteries. new build with have 6 Group31s in the back and 2 group34's under the hood and a bunch of 2/0
shouldnt have much if any voltage drop