Well, I haven't spoken to Steve, for over 30 years, he knows TR7's, I remember his workshop in Stubbins Vale was full of corroded TR7's awaiting various repairs and cars in for V8 conversions, so he knows his TR7's inside out. I've confirmed from 2 separate sources they are hardened...the debate about E5 or E10 compliant is for a different day. This was an interesting article with some background history.
https://classicsworld.co.uk/guides/triumph-tr7-buyers-guide/Thanks for posting this discussion. its rekindled my interest in TR7's...I need to scratch an itch........enjoy the car, check the density of the antifreeze..........dependant upon its service history I would flush the radiator and replenish the antifreeze.
