the heat shields are original for the 283 with proper spark plug wire routing, which should go down the back and along the pan and up, being held by the slotted tabs in your pic

look for a stamped number on the protruding block pad at the bottom front of the pass side head, if it hasn't been milled off from rebuilding it will say more about the engine

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