a high output alternator would kick that 130amp alt's ass...
I know where you can get 200, 250, 300, and 350 amp alts, custom built, with overdrive pulleys even if you wanted.
Problem solved with a 3 or 350.
I would be worried about belt slip with that setup.don't look like you have very much belt wrap on that AC or power steering.
And, where did you locate the second battery for this dual charging system? You did seperate the charging system into two distinct/separate systems, right?