Tim- Only a guess, but if you had to clean off the contacts in the distributor, and the rotor was fouled too, then it's (past) time for replacements. Had a similar problem with my 380SL, and upon inspection, discovered that the rotor was totally chewed up. Unlike my old Chevy, which would quit when the rotor and cap got the least bit fouled, these things will run up to the point of virtual disintegration, then they stop. I'm sure the parts are pricey, but try new ones. Check the wires too. Have they ever been replaced? Good luck, Ned