[65hilly]

I had an experience with the engine in my Capri V8, that sounds like the exact same symptoms. Note sure what ignition system your using, mine was the standard dizzy and points. As I said same symptoms, just at a constant mid range miss / flutter. What it turned out to be, was the condenser in the distributor, as the vacuum advance rotated the plate inside the distributor, it pulled the wire out of the condenser!! found it by pure ass!