[Hooligan63]

See,if it's a bad lifter,a bad pushrod or a bad valve you'll hear a loud tick,and possibly a knock while it's running.Might want to check for vapor locking in the fuel lines too.Now,I'm guessing when you say shudder it's like when you drive a manual transmission and try to take off on a higher gear at too low of an rpm?Only way I can describe what you're trying to describe.Also,might want to get rid of your points and drop in a pertronix unit.Points are a bitch man.With a Pertronix,no more having to change points and condenser,or gapping points.But with the way you described your plugs,sound like you're burning a lot of fuel and running a hell of a spark,so might want to definitely look at the timing,and possibly air/fuel mixture at the carb.Also,run some Sea Foam through the fuel and oil,which will get rid of a lot on nasty crap in your system.