I have to agree with Carla. The problem source is most likely in the distributor. Before pulling it for rebuild check the points and especially replace the condenser. But it's always smart to rebuild the distributor too in 235 that old and well used. They are very easy to rebuild, but occasionally rebuilt/NOS ones show up on EBay.Remember you can use a distributor up to 1962 so parts are at NAPA.
