i would go more strands than that. thats like a commercial/industrial installation 1-0 check local electrical suppliers more so than lowes/home depot etc. they will be able to access a much more in depth selection of wiring for you. aside from this wire being extremely uncooperative to run through a car then you also have to deal with crimping lugs on, or sourcing a heavy duty lug to terminate the wire to the battery. To simply put this is overkill" for a car. like Ark said you can always check local stereo install shops for wiring. while this stuff is usually around the 12-20$/ft mark it is plenty stranded and tends to have a nice protective gel coating perfect for installations such as this.
Good luck with your hunting man!
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