the timing is 12 degrees and you have 2 fuel things to set up one for idle which you've done and there's another one which does you on boost fuel which is the little black/grey box on the fuel metering unit but you really need to know what your doing to set this and some equipment to monitor the results and if the cam is knackered you'd get some erraticness but not normally to the degree your getting, you need the cam timing setting aswell as the dizzy you really need to go to someone with knoledge of them, jano would be my choice down your way he knows his apples