Comet antennas makes a nice clamp on hood mount (CP-5NMO) that is adjustable in all directions to plumb the antenna, and uses a short section of spaghetti coax that fits nicely between the hood and fender. Also the body of the coax fitting unscrews so you can thread the coax through a small hole or grommet in the fire wall without the need for cutting the end off and soldering on a new one. Have a couple of them on my WJ for many years and seem to hold up well. Tried the thru the window coax a long time ago, and was not happy with performance and did not last too long before it got damaged. Was also annoying having it hanging.