[SPS]

I really don't know why anybody would argue this with Charlie. He likely knows and has seen more of whats going on than anybody.

Besides, as he said, this rule has been in the book and accepted for ever. A lot older than 1991.

It also affects all other engines (Chevys for sure) too.

As Charlie said, "where do you stop milling??" at the valve guide??

The cylinder head guys (the majority) have honoured this rule to date, so it is what it is.

FJ