really no way to tell, and unless it's been rebuilt in the past dozen years or so, it's unlikely it'll have hardened seats - OTOH, it's unlikely you'll have any problem unless you work it recklessly hard .... if you wind up rebuilding it, hardened seats can be added then

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot