Trans Am (LOL):
Super Clean/Purple Power will clean right through that crap. Buy a spray bottle, spray the shlit out of it, including the rad cradle area up front, rinse it off, repeat where necessary. I've never worried about electrical stuff, and never had an issue. Though that car is uhm, older. Then again my POS didn't die so why would that? Right? Wipe it off after final rinse, and take it for a ride to get it hot. You'll be amazed. Show us pictures whatever you decide to try, a nice tutorial in pictures. Like that Flinters Renovations, only different.