Originally Posted by 67Mustang Al.
The thing with points ignition when there are 8 plugs to fire, the coil has to build up charge between each cap contact so the time is limited and when you build up revs there is less time for the coil to build up charge, so the voltage to each plug will decrease. The points cam follower whether its plastic or fibre wears and the points gap will become smaller as well after time.
I use an MSD ignition with blaster 2 Coil on my 347 stroker and it starts as fast as the key is thrown, has no issues at all and stays in tune. Street use only.
This is true of any ignition that uses a coil. As revs go up you have less time to build the field charge in the coil. The biggest issue with points is they become unstable at higher rpm and can bounce or float. The electronic distributors either use optical or hall effect sensors and they are just as stable at 8K rpm as the are at 800 rpm. Nothing mechanical to bounce around.
A good HEI is more than most street engines will require.