[Need help on Electrical]

Well I have a S10 running on a yellow top, and i need to upgrade my current setup is a 1500.1 orion xtr amp along with a rockford 400.4. I have one run of 1/0 awg and stock alt. I also hope to add another 1500.1 what batteries would fit my needs and also what size alt should I look to run with them thank you for help.

[Need help 2 dc lvl 5 15 m2 enclosure]

I would relocate the batteries, maybe undercar? and for these subs go bigger and as stated above your port placment is not good subs up port back and center port or go driver side... I had two m1 level 3 15's in a full size blazer 89' and the box was around 9.5 cubes after all displacment and it did high 140's off 200 watt hifonics on stock alt and yellowtop.