lots of folks here run unleaded without problems, including moi, in a 235 and a 283 [E10 actually] - if you get the valves done sometime, get hardened seats, but you won't have problems, the lead additive is unnecessary

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