The problem is You won't be able to tell how bad it is until You try to seat the valve, once You've hit it with the cutter, if the valve angle is off, the seat may be screwed
to the point that You'll have to live with it sunk(NOT performance enhancing) or as IQ52 stated..fixed by a machine shop and a seat insert(s) installed. If the drill press
is a sturdy one and tight, You may be successful if setup is done well & carefully. Good luck..............
Not to mention where the valve tip may end up in relation to the rocker arm :eek::eek:................