Well....stall not got to the root of the problem. We are in the process of trying to eliminate a few things. Have just changed the HT leads which were fooked and this has made a slight difference, but it still wont rev over 4000. It just restricts itself. Also changed the rotor arm and dizzy cap, unfortunately couldnt do the sparks plugs because we dont have the tool. Garage job. Also have Tried taking the induction kit off to see if it was blocked, but made no difference, strange that it was still loud whent I put my foot down though. Next, I am going to change a couple of temperature