Stocker Cylinder Heads....

[Alan Roehrich]

Originally Posted by SS Engine Guy

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.

Well, 0.250" below the stock valve seat angle was the rule until they opened it up. Now there is supposedly no limit on the number of angles, and I was told 0.500" below the seat angle would pass. I was told a radius seat was legal as well, I just have not had time to try one, yet.