I'm not sure the same seal fits both valve stem sizes.
When 11/32 guide wore out, lotta folks moved up to 3/8, was a natural, no new guide needed.
So it's conceivable you need 2 valve stem size seals and 2 seal guide sizes.
Possibly 4 diff seals.
You need to look a little further to see if seal fits both stems diams.
Lotta knowledge here , someone may know .
Good luck
