Is this a good battery diagram/battery bank

[hrtbrk1 5,000+ posts]

I agree.
It is good to try and spread the load over the batteries in some form. In the OP's form, if he has a lot of current draw between the batteries and not too thick of wire/buss bar then that wire will heat up and cause resistance.

drawing less than 400 amps and using 1/0...will try to make copper buss bars

 

[Buck 5,000+ posts]

drawing less than 400 amps and using 1/0...will try to make copper buss bars

If you are drawing more than 300a, I would do at least 2 runs of power wire.

 

[hrtbrk1 5,000+ posts]

yeah thats what i plan on doing...thanks guys for all the help

 

[loopkiller 10+ year member]

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You always surprise me.

And by alt-, they mean ground, right?

Yes the ALT- is your ground. That is the end point for all power produced by the alt. If the power is provided by the battery, the end point is the NEG- battery post.