X O U or J heads on a 416?

I know this is an old thread but I have seen this build referenced several times in other threads and the link doesn't work. Could MRL or somebody chime in and tell me where I could read this thread?

Thanks.
Guy went out of business years ago. Was known for "grossly" exaggerating dyno numbers. His engines typically made about 150 HP less than "advertised" backed up by real world testing.