My 1950 club coupe V8 seems to have no damper on the end of the crank. My green bible mentions one on the six cylinder but fails to mention the V8. Should there be one? Possible that the previous owner left it off during rebuild? I have a vibration starting about 2000 RPMs which I believe is the flywheel but a mechanic said it could be the damper but he also said he was not sure if these engines ever had a damper. Also, what size wheels were standard...15" or 16"? Thanks.