I used a hole saw to drill about a dozen 1-1/2" holes in the floor of the passenger footwell, and put soffit vents in there (glued in with gasket material). This way, the engine sound fills the entire cockpit nicely, and very little water or dirt gets in from the road.There is no doubt I would rather listen to the engine than the stock radio. FM/AM News? Intresting. On a serious note, does anyone have a wiring diagram or detailed drawings for stereo replacement?