Stock ignition coil location

[Lippyp]

OK so now I've gone with a pertronix conversion kit for the Mallory I'm stuck with an external coil (Pertronix flamethrower in black so it blends in with the firewall) You can see from the attached picture where the old coil was located and although I get to lose the external ballast resistor I want a more discrete location and it needs to be mounted vertically to avoid the coil overheating. Where was the stock coil located? If I can't fit it there anyone got any ideas of a good place to mount the damn thing so its a bit more out of sight? I'm happy to get longer leads if I need to.