Timing Chain Noise?

[TMHEFFRON@aol.com]

I am getting a highpitched tinkling noise (insert bathroom jokes here) from 
my 66 Sprite 1098 engine on over run. It sounds just like light pinging but 
it's isn't. It isn't audible under accelleration or at speed, probably 
because of the exhaust noise, but is easy to hear after letting off the gas. 
It's doesn't sound like small end or big end rod knock, is the same speed and 
frequency as valve train noise. Timing chain? Valve guide? Any suggestions?

Terry 
St. Charles, Illinois