Oil mods for my 408?

Got you on the word choice. Maybe it's the steroids I'm on for my lungs - next time I'll choose more carefully.
You asked if I had that problem - no - never. My engines don't break rockers, don't break pushrods, don't break shafts, and I've never had lobe failure issues with flat tappets. You might try re-reading post 17. The examples I noted are first hand but as I noted were not built by or owned by me. They all failed at the track either during competition, test and tune day, or retal day (one each). I was present for the breakage and when they were opened up on their respective days.

"Lifters should not be coming out of the bores. Period."
I agree 100%. Cranks should never break, rods should never exit a block, and yet they do during certain failures not related to them. I build for that possibility because I've seen it more than once and because there are other reasons (power & valvetrain stability) to do it. The last valvetrain failure I personally had was in 1991 when I had a few pushrods bend and one punch through a factory rocker on a mild hydraulic cam 440. My setups have evolved over the years and since then I've never had a valvetrain failure with an engine I've built.

"...busing bores to help keep oil pressure if they do...is completely wrong."
this is your opinion and I'm sure there are others that share it. I disagree and I'm certain we'll both continue to do and recommend what we believe is best.