ignition coil ?

I bought a 3ft length of bulk metal-core secondary wire. It's part of my anti-theft system; I take it with me into the hotelroom when away from home.
My coil is on the horizontal part of the apron. I have seen guys mount it to the firewall, which is not far from the headers either.....
IDK how hot is too hot, but the oil inside should be good to perhaps 230*F or more. I think, until it starts leaking oil, it should be fine.