I agree with Patrick on the intake question. I wouldn't spend the money on the air gap unless you were building a street truck. Towing, you'll need the bottom end the kegger nets.
I've never really seen the point of a double roller chain. Maybe someone could explain the advantage/gains of one?
And are you talking about running 2 separate fans with a thermostatic control for them or what? Two 14" fans is all you'll be able to fit on the radiator and I'd worry about overheating when you were towing or driving it hard. Have you seen this kit?
http://www.ffdynamics.com/ramB.html
They also offer an extreme kit that's pushing 7000 cfm.
Everything else looks good bud. It's actually what I plan on doing to mine in the future lol
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