Stocker Cylinder Heads....

[SS Engine Guy]

Originally Posted by Dwight Southerland

3) Alan, your explanation of the characteristics of a legal valve job will never fly. I'm not saying you were not told that, but if that's their (NHRA) assumption, it needs to be in writing. I see nothing in the current rule book that gets even close to the description you gave.

I have been given the same explanation as Alan and also in writing (for what little that is worth). 3 thru tech with not a word said and never used the letter. The only thing I was told that wouldn't fly was a radius valve seat. (which I don't use) However, I have seen them go thru tech also. I think this disinformation is what Wade is trying to clear up.
There is some hp directly behind the valve if work is done correctly. I would think that .250 thou. below the seat would be all that should be allowed in stock. Anything more I would consider a form of pocket porting.