BTW, someone had asked at what RPM it went bad. It was around 6000 RPM. I beleive my MSD 6AL rev limited is set to 6500. I have rev'd it to this RPM for many, many years without issue. I starting to guess it'll be one or two pistons gone bad #8 and #7 spark plugs were very wet and #7 had oil on the inside and outside.

And/or the timing chain (which is a double roller for what it's worth) jumped as people have suggested OR the single bolt cam bolt sheared off. IF it sheared off would things still rotate fine??

Sorry for my engine ignorance. I'm pretty good at tearing it down, but finding TDC, etc. and I haven't a clue. :-(