How much can valve head OD be cut?

gzig5 said

Can't you have the current 2.02 intake valve seats in the head removed and new seats installed and cut to 1.88" or whatever you need?

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I thought of that, but the throats under the seats (should) have been cut to some extent to match to the ID of the 2.02" seats. So it seems like putting in smaller seats would put an edge right under the valve seat sticking right out into the airflow. I think I'll decline the idea of using JBWeld to fill it LOL

I just don't know enough about that area to say for sure what could be done int that regard.....