the main difference in the cable is the thickness of the conductor inside the cable. the connecters look the same, but where the dielectric and the conductor go is larger, it is able to carry a larger bandwidth thatn the other, so rg-8 or rg-6 are your better bets
barretts jeep is at the exhaust shop today, tommorrow install minor misc items (gauges and pass seat) and we will have it there saturday for a shake down run