Okay here is pictures of my setup.
Here is the alternator, Custom Electric 250-amp hairpin 3-phase
Here is my starting battery, I beat out the sides of my battery tray with a hammer and shoved in a Walmart-special 24F in place of the old 51R, with an improvised tie-down until I find something better.
The above are both old pictures, I've since attached a run of 1/0 gauge OFC wire from the alternator direct to the battery:
Here's in the back of the car, the batteries are behind the speaker box and not visible in the picture.
Last but not least, tonight's festivities: