You make a pretty convincing argument to do this right in the first place.
The effect of valve guide mis-alignment on the valve seat fit seems really significant.
Can we back up to the (maybe not so good) idea of using a piloted chucking reamer to try to salvage what I have.
In my dreams, if the old guide can be reamed down to a thin shell, eventually would the thinnest portion crack away from the head casting, and then the entire shell could be removed in pieces.
Does this ever happen?
Or is the old guide somehow rusted tight and needs to be machined out.
