[Lawrie]

Craig,
I always have a spare set up distributor in the 33 .
You should get another distributor from some where and try that, some time the problems take a while to sort.
I would fit new spark plugs ,that is an easy thing.
Try another cap, and rotor.
change the condenser ,
put new fuel in
One thing I found on one of my misfire problems was the little brass straps that connect the points to the round low tension contact were bent out of shape and one was shorting out on the steel part the points spring screw goes into.
Lawrie