After getting no reading on the secondary side (with the DVOM on 10K) I tried all other ranges, even a different meter just to be sure.
I took the coil out of the cap to measure it. I have a spare ignition module from a V8 ?78 T/A, would that work in the V6? (I have no experience of ignition modules).
I don?t know how many miles the car has done, the odometer shows 80500, but the transmission needed to be replaced due to reverse gear failure. So I reckon its more like 180500. But I really don't know.
Would there be other signs if the chain had jumped? The engine always hesitates on WOT, and some times pops through the carb.
With my luck, and this car, I probably have ALL the problem you described, and will need a complete rebuild.
I will see how much more I can get done tomorrow, Its 34'F out, and raining. The firebird doesn't fit in a British garage. LOL.