Just trying to ID the rockers, the box says truck but who knows. I know they are NORS Y block rocker shafts. The thing is, there is no part numbers on them.
Based on the 279, 317 and 302, they are rockers for the early Lincoln engines, maybe Ford heavy duty trucks which used a version of the Lincoln engine. Now that i read a little closer, it looks like it says truck on the tape.
Good Lincoln and big truck stuff is getting hard to find. They have value but finding someone who needs them may be tricky. They look to be adjustable. Lincolns had hydraulic lifters but trucks were solid tappet set ups.
Did you get this resolved? There's a guy on ebay has an identical set. This is his description:
"1952 - 1955 Lincoln 317 & 341
1952 - 1955 Big Ford Truck 279 & 317
1956 - 1963 Big Ford Truck 302 & 332 the shafts and rocker arms are the same. It's the rocker stands are different. The part that bolt the assembly to the head is different."
Sort of, I know they are Lincoln truck rockers but no one seems to want them. So they are sitting in a drawer until run out of room and then probably scrap pile.