I also have one from the past. My son does a ton of heads of all makes. Re-seating your old valves will work. But you said you ordered new valves. That may not work out so well. I have seen first hand what happens.
My son resurfaced a set of heads. They had new valves already installed. Same thing your doing. Steve checked the seal with a vacuum pump it was fine. They called up after installed and said it was popping out the carb at RPMs. An intake valve was leaking when running.
My son brought the heads back and pulled the valves. Two out of four the seats were not concentric with the stem. It was a Harley EVO . And they take a common valve.
The pattern on the seat was good . Because the guy was turning the valve in a circle, That is why that tool goes back and forth. If you spin the valve in a circle you will get a false reading on the seat in the head. Just a heads up. I have done what your doing more then once in the last 45 years . Have fun if you were closer he would seat those new valves .
Years ago a seat was 3 different angles, Three different stones and you had to keep dressing the stone, Every valve, Every angle. That is why and old three angle valve job was costly.
Today they have cutters for race motors that can do up to 7 angles at once. He mostly does 5 angle seats. When he showed me that I asked him Why he charges the same. His answer was the, In the end the cutter saved time and is more accurate but the cost was high for the tool and they don't last . He grinds some tooling but there are some that just get tossed.
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