ignition coil

[Lawrie]

Not for my 33 or 34. but for a model A
What. is the difference in the resistance mean for the spark and points,
I see running a points 6v pos earth distributor on my test machine, a .7 Ohm coil puts out a way better stronger looking spack than a 2.5 or 3.0 ohm one.
I have copper leads .
The coil. that seemed to work the best was a modern square one with .7 ohms.
any help.
what will maybe bugger up by using the .7 ohm coil
Thanks Lawrie