As this is for an old car, I don't suppose you'd care much for audiophile sound quality. What I'd do is use a basic 1DIN head unit with aux input. That way, you still have an option to listen to AM/FM and basic bass/trebble and volume controls. It's easier to work with a physical volume knob than the rocker or on-screen volume controls on the tablet.
All that's left is a separate amp and driver for the sub.
Last edited by oj88; March 22nd, 2015 at 06:44 AM.