somethings not firing at the right time, or a valve is not in it's proper place when the firing occurs...
the easiest way to diagnose this and many other engine probs is to start from one end of the process, check it, and move on along the line.
when redoing caps & wires, sometimes even a small crack in the cap can throw everything off. check for hairline fractures. ( and even check the firing order... could even be as stupid as a mixed up wires) then recheck points and gaps... since is a good first step since this doesn't cost anything. It never hurts to do a valve lash on an older motor. this will make shure the valves seat correctly...
then check compression.. this should tell you if your valves are sitting correctly or if something major is wrong. and will tell you which cylinder to focus on.
this should be a good start before finding out you have to rebuild the motor.
- but then again, you already knew all this from performing online searches.:flipoff2: