yikes. good luck, those are more for ht duty than in car. unless you are making a wall for SPL line array work - you might want to reconsider and get a nice set of cmops man.
ill be getting some B3S's for my HT setup, i just finisehd putting together the enclosures for them a few days ago
how are you planning on mounting these? Line Arrays work by the speakers all being on the same plane, and their normal vector being aimed at the listener. If you mount the speakers going up/down the A pillar's, the normal plane will be shooting at your stomach, if not lower. I don't think it will sound good. Also, depending on your configuration, you more than likely won't even have enough room to work with in a car...
but if you are still willing to try, i would definately go with some decent PE buyout speakers, like...