[Spits] 75 spitfire - no spark

[Dave]

it was running maybe two months ago?  been sitting outside, waiting for me to
get to it.

has a weber and header; no pollution stuff; has an allison electronic ignition
system.  Ibve had the car about a year.

has a car cover; been a lot of rain.

according to my tester, no spark.

Ibm going to order a new cap and rotor; in the mean time, how do I test back
from there to see if itbs the allison or the coil?

thanks!