@kart74
Here's something we found testing with a dial back timing light.
I dont know if you are aware, but the stock coils will pull timing out at higher rpm.
We tested probably 10 or so stock coils. All of them started pulling timing out in the 4k-5k rpm. Some as much as 8* at 6000 rpm.
These were tested with the ngk bp9es and autolite 3910x plugs.
ARC, PVL, and the tilly 212r cast aluminum flywheels.
Coil air gaps set at .045"-.075".
Timing set 28-30*
We tested 3 dover power coils, and they only pulled 1-2 degrees at 6000 rpm.
A noticeable improvement in 0-600 ft testing.
We only tested them with non-resistor plugs. We didn't have any resistor plugs for testing.
I wouldn't recommend something I havnt tested and use myself.
I won't be using any other ignition coils.
http://www.doverpoweronlinestore.com/catalog/item/9100750/10483555.htm