Completely agree with the above, no diffence between US and rest-of-the-world valves and valve seats.
I'm using unleaded in my TR7's for more then 10 years now without a problem. Always fill up with RON 98 or RON 100 octane fuel. The highert the better they run [:)]
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<font color="blue"><i>1981 TR7 FHC Sprint (better known as 't Kreng)
1981 TR7 DHC (not very well known yet, but back on the road)
Also a 1980 TR7 DHC, 1980 TR7 DHC FI, 1981 TR7 FHC
http://tr7beans.blogspot.com/</i></font id="blue"></center>