Been reading the thread - I have the same issues as Marco. '72 MGB, started running rough, then died. Points style dizzy was shelled out, so I borrowed an electronic ignition setup from a friend. Unfortunately, in my haste to swap the units, I pulled the plug wires off the old dizzy before marking the sequence (IDIOT ROOKIE MISTAKE!!!). Friend and I guessed as best we could, cranked the engine, got two backfires and then nothing. That was in March, and I haven't got it running since. I've got no spark to the plug wires, but am scared to do all the static timing tests with the ignition on and the new Pertronix EI dizzy not running - Pertronix and others claim that will burn out the unit. What do the smarter/wiser members think about a possible slipped timing chain? The engine in this car was rebuilt about 10,000 miles back, so I would have a hard time believing that was the problem. And I REALLY don't want to pull the front end of the engine apart just to see if the timing marks on the sprockets line up.
Any help would be appreciated. Marco - have you made any progress sine your last post?