Fair question Ron.
I do have a new unit.But the valve seat's pocketed & the lifter peg strikes the tappet. As compression's good & the valve's in otherwise good condition it'll stay that way until the seat's replaced.
So the idea of using the old stuff was simply to avoid carving up the new one.
But it did all seem like a lot of work & expense, so since the parts are available I've taken a bit off the new unit to make it fit.
It'll hopefully be good enough when the seat's done, otherwise another will have to be bought.