[Mark Yacavone]

Okay guys, I did some checking.
Yes, any valve job means just that.
Grinding the seat area on a valve is part of a valve job , so that's legal..at any angle.
Back cutting the area of the valve above the sealing angle,...legal, and part of "any valve job"
Reduced stem between the valve head and the guide .."Any valve job"
Cutting the sides of the combustion chamber away with your top cut... Yes, you guessed it.."any valve job"
Apparently , no modifying of the chamber refers to grinding or cutting in the plug area, and between the valves
Oh, and + or - 1 degree does refer to the fixed valve angle in the head...not what it used to mean. Of course angle milling a certain amount could put the valve at more than 1 degree different than the factory spec, but angle milling is legal.
Some of this sounds contradictory , but there it is.

I hope this helps a few racers that aren't familiar with reading between the lines of the rule book.