You can run the car with a jumper connected, if you have points it will eventually burn the contacts in the points. If you've done a conversion you probably won't have to worry about the jumper hurting anything.
FWIW, I bought a 1970 Judge in 1975, and the owner had a toggle switch wired into the ignition system because the ignition switch had already went bad at about 50,000 miles, pretty common problem.
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Brad Yost
1973 T/A (SOLD)
2005 GTO
1984 Grand Prix
100% Pontiacs in my driveway!!! What's in your driveway?
If you don't take some of the RACETRACK home with you, Ya got cheated 
  
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