TRF TR34 valve diameter

["Paul Dorsey" <dorpaul@negia.net>]

Hi,
I want to order one exhaust valve for a '66 TR4 or TR4A and the TRF website
shows this valve as fitting both TR3's and TR4's. Here is the results from a
search at their website:

      108806 T34 VALVE,EXHAUST
     CUR  L 0 15.95

 However, since I have taken apart heads from both models, there seems to be a
difference in valve stem diameter on the two engines I have taken apart.

Is this possibly a misprint at the TRF website, or, has my '60 TR3A been
fitted with valves having a larger diameter?

Should I be getting engine parts elsewhere?

Thanks, Paul