problem only after bearing?
the distributor is full of little sensitive goodies that drive the ignition system.
if you fractured anything,it is asking for it.i would change the wires for 50 bucks.use the originals.some have a specific resistance . if the problem is still there,you disturbed something in the distributor.scope the signals driving the ignition module and see if the input is erratic. if it were mine ,i would replace the distributor,if the bearing was bad you must have 160000 miles or so on it .....