https://www.ebay.com/itm/165172164818
https://www.ebay.com/itm/402449875973
Discuss with the seller:
1950-58 were open oil feed tube with centered oil grooves in the rockers.
1959-62 were closed oil feed tube and off-centered oil grooves in the rockers.

You can also post in the truck parts wanted section.
https://www.stovebolt.com/ubbthreads/ubbthreads.php/forums/17/1/truck-parts-wanted.html

Last edited by buoymaker; 12/11/2021 11:37 PM.

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."