Yes it should run ok if everything is running ok. Mine is 400bhp (stroked) with greys etc and only having some vibration on idle due to the vibratechnic engine mounts but since you put it on gear and travel no problem: to give you an idea I can put 4th on a straight road and the car will travel on idle with 500 - 600rpm! I also having missfires sometimes on full throtlle above 4000rpm but soon I will throw away the old ignition system and I ''ll put wasted spark.