'66 Sprint GT, '67 Duetto, '70 BMW 2800CS
Is your problem:Did you re-set the ignition timing?
1) That the timing is now incorrect, as Alfar7 asks.
2) That the coil isn't putting out a spark?
Connecting a timing light to the coil-distributor lead and then cranking the engine will answer this. If the timing light fires, then you have spark and timing is probably the issue.
If no spark, then perhaps the Pertronix module is too far from the cam lobes as Roadtrip suggests. Once you get that sorted out and have evidence of a spark, you will still need to set the timing.