Ed, knocking heads of valves is VERY expensive
Doing so has set me back a full season.
And yes, I will verify the checking head dimensions are the same as race head. Gary Hettler is doing a replacement head for me and also has the "good" head for double checking.
The cut up head is mostly for fun, I will verify the clearances with new race head.
I expect everything to be OK and "maybe" make the D 4 September race at Thunder Road.
One thing about the cut up head, it is a good conversation piece. At the shop a number of folks have noticed it and looked it over. The same comment from everyone, "I did not realize how the water passages look"