Gas for a TR6

[Tim Hickey <tjhickey@gatecity.com>]

Are you guys running Unleaded gas in your engines? I thought that  these
machines required lead for the lubracation of the valves. I have a 74 tr6
under reconstruction. Two years ago I rebuilt the engine, and wanted to
have hardened seats put in the head. The local shop said that there was not
enough room to machine a recess for hardened inserts. So nothing was done.
Did I miss an opportunity? Do I need to run a lead substitute?

Thanks..

Tim Hickey