Tips and tricks through the ages

Friend of mine who wrenches mainly on Studebakers these days had a Hawk in for some work. When he finished, took it on a test drive. Heard an awful racket from the rear of the car, looked and looked, finally figured out it was something rolling around loose in the gas tank. Got it out - it was a lead ball. Owner had put it in the tank because someone told him it would add lead to the gas.