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I'm going to buy a valve seat grinding tool set.

1 1/2" for 1 7/16" exhaust?

1 3/4" for 1 43/64" intake?

The sets that are readily available and reasonably priced do not include a locking pilot. Is this an issue?ebay.com/itm/225042095012

11/32" locking pilot shown.ebay.com/itm/176379809756?chn=ps&mkevt=1&mkcid=28

I believe the pilot upper diameter needs to match the handle inner diameter.

Excellent valve seat grinding video shown at following link:youtube.com/watch?v=la4Kfl2H590