This might be a stupid question.  
I'm finally getting around to putting a Pertronix unit in my 57 Convertible. Looks to be pretty simple and straight forward. Only difficulty is that since it is a 368 Y-block the dist is on the back of the intake next to the firewall and kind of awkward to get to. Also there is no notch in the housing to feed the wires through. Planning on simply drilling through the Cap unless someone thinks that might be a mistake. I really don't want to pull and drill the housing. Any thoughts?  Will this cause a problem in the future as long as the wires clear the rotor?