I don't know about testing them, but I'd junk the lot and fit a Sachse system!
Just in case you're still looking at a Sachse. I was told it didn't really matter what coils are used so long as they are otherwise appropriate for the engine. So I opted to keep my 5 Ohm Dyna coils in place of the Sachse-supplied unit, mainly because they look better, were as new, and were already nicely mounted. Regulator is the original '82 unit. All runs perfectly.I've already looked at the Sachse system and been advised the same by another owner. The instructions really suck and there are no comments/recommendations on what to do regulator and coils-wise. Duccout: have you gone with Sachse and if so what extra ignition system components did you use?