Thoughts on heads
For some reason when I rebuilt the engine that I just had built since the builder didn't notice my 400 block at 4.375 bore required notching.
Not because the valves were going to hit the cylinder wall but simply because the chamber overlapped the deck surface and I unshrouded that so It wasn't washing the cylinder down because of fuel hitting the deck & I believe that was also causing some detonation on the first rendition of my 470.
So that's just something for anyone who's installing any new heads to watch out for.