Put some paper bags filled with fresh charcoal briquets under the seats. They suck up moisture and smells. Sprinkling baking soda and vaccuuming later helps also.
you can take the adapter for a shift handle and drill and tap it for an allen set screw. Slip that on your e brake rod and tighten up a countersunk set screw then screw the handle on the adapter.
2400 watts 2 10s one 12 and 4 6x9s in my plan. want to burn a disc of the car running and play it with car shut off so people freek at shows. look the cranks not turning lol