I don't have the manual for that engine...
but in general , to replace the seals you are down to just the valve stem sticking through looking for the seals, springs and whatever pushing mechanism is used in that engine.. so it is bare and there is probably no additional work using new springs for putting it all back together... I do not know how much work getting TO that spot in the overall picture for your engine ...
But Someone will answer that shortly I presume...