Thanks Vikki.

The engine is a 326 2bbl. The Owners manual says Regular grade and also that the compression ratio should be 9.2:1. When I tested I was getting around 11.5:1, this may change with the rebuild though?

Anyways, Regular Unleaded over here is 95, Premium is 98 and 4 Star Leaded (few and far between, but available) is also 98. Which of the Unleaded would match up with 1960's US Regular?

Valve guides are not showing excessive wear so they'll likely be staying then. The valves should be replaced - the pair for the cylinder with a gouge are looking a little rusty and pitted. However, I was thinking about a rebuild kit from Kanter but they haven't replied as to what their valves are made from, so I'll start looking elsewhere. Does anyone have any advice on manufacturers of rebuild kits? Or should I start a new thread?

Thanks again.