We're talking about a crotch piece with metal in it, 30-inches at one end, a bit over 20-inches at the other. I'd need to get it set to follow the grain on one part of the crotch, and control it, and keep it from squirting out... it ain't a "log", it's a big nasty hunk of twisted, gnarled wood.
If it was me and I wanted to "defeat" this piece I would take an almost dead chain, sharpen it up one last time and start cutting until I found the metal. Then work your way around it and get the two pieces separated.
This reminds me of the time I cut apart an outhouse and hit the toilet seat studs with my chain. That wasnt pretty...