[TR] Valve Composition

Randall TR3driver at ca.rr.com
Sat Mar 1 07:58:32 MST 2014

> Question 2:  Since I'm replacing the valves, guides and 
> springs anway on a TR-4 head of unknown vintage, I can choose 
> either the 3/8ths or 5/16ths and either will fit, right?

Yes, but the heads and guides are different.  It takes a special "conversion" guide to install 5/16 stems in a head that had 3/8


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