Hi, firstly compressions are a little low were they taken at wot?
did you check valve clearances and cam timing?
and thirdly the coil, if your using points and condensor you need the correct old style coil not one for electronic ign systems as the resistance is too low and will give almost exactly the symptoms your describing are you running a ballast resistor with your set up or a straight 12volt 3ohm coil?
hope this helps
also while the heads off worth grinding the valves in at the very least, especially if the engines done many miles on unleaded!
Ray
