Have a look at the coil and its supply lead, standard it has a 9v coil and a resistor wire in the harness, this gives trouble ar resistor wire is odd and will not solder or weld and its expansion when hot loosens crimps!
If you put 12 volts into a 9v coil it overwhelms (magneticly) the windings and gives a poor spark, also burns the points.
altering the compensating valve has nothing to do with the idle circuit
the compensating valve is what gives extra fuel for acceleration ( accelerator pump)
putting a hole in the butterfly is making for less vacuum as vacuum happens when the air flow in the manifold is restricted--not lessened
what you need to do is enlarge the idle circuit port to let more air past the butterfly, increase idle jet size or increase the idle rpms to around 1200 rpms as high lift cams are not idling cams
The cam you should have used is an extended duration cam which has the same lift as a standard cam but has control of the valve over more degrees of rotation
same effect with less lumpy running
You really have little choice but to take it to a radiator workshop as the radiator needs to be fixed properly otherwise you will cook it & if you do it will do untold damage to the engine rendering the vehicle useless they will probably be able to fix the bonnet latch as well at low cost.
HI, if you put the engine marks on the front pulley to TDC, when you put the distributor back in make sure that the rotor arm is facing toward the number one plug lead- good luck.
