Anyone recognize these as I6/I8 Packard valves?

[Jack_Vines]

In a pallet of Packard V8 parts were this NOS set of non-V8 valves:

5.89" long, .3395" stem diameter

intakes (only 7) 1.800" head diameter
exhausts (set of 8) 1.435" head diameter

The exhausts have a p/n S1813 stenciled on the head. From the Egge catalog, this p/n would be for:
PACKARD 6 / 245 CI, 1947-1948
PACKARD, 8 / 288 CI, 1951-1954
PACKARD 8 / 327 CI, 1951-1954
PACKARD, 8 / 359 CI, 1954

For whatever reason, Egge doesn't offer intake valves, so I can't get any info there and there's no identification mark whatever on the intakes.

Does anyone know for sure what I've got here?

jack vines

[Jack_Vines]

The experts on another forum identified them as '54 359" intakes and exhausts. Now I have to go through the shelves and see if the eighth intake valve escaped to another box.

jack vines

[packards42]

what kind of retainers,