The one intake seat I cut would have had a .040 wide 45, with an OD of about 2.240.

Without a doubt one seat was cut that way.

What was done to facilitate the use of a 2.20 valve on that seat I have no idea.
But after doing this as my job for 30 years, I can tell you it would not require excessive valve sinking to make that work.

A few minutes with a couple of seat wheels and it would be good to go.



I have no doubt that had we seen pictures of all 8 intake seats with the heads all apart after cleaning and media blasting, it would have been no trouble pointing out which seat had at one point been cut for the 2.25 valve.

There are options to get around the sunk valve if it were too objectionable....... one of which is to just replace the seat ring and start over.