Originally Posted by
organicmuch
Now, 3alarmer brings up another problem with interchangability between peugeot and other parts. Am I doomed to replace the entire bottom bracket?
I think "doomed" is putting it a bit harshly. A Velo Orange bottom bracket and compatible crank will solve all of your problems at reasonable cost.
I fully agree with 3alarmer that insisting on an authentic period restoration is a very limiting approach for a bike that is going to be used as a practical rider. If you were restoring it to be a museum piece, fine, but not if the bike is to be put to practical use.