where to run Amp Cables

Hi there,
I'm hooking up an Amp using 8 gauge cable... can anyone suggest any easy ways of getting through the firewall and getting the cables to the truck?

Should be able to easily run it along the door sills. There are several firewall holes. In some cars (dunno about this one), you can run the cable between the door and the car and then bring it inside, so you don't have to poke a hole in the firewall.

There's a rubber grommet in the firewall just below the battery tray. That's where I ran mine through and just down the sill to the back.