I'm still experimenting with OS, but to me it's top notch bow wood.
I have a 2 staves over 70" long that I've roughed out to ELB
dimensions. I really think this wood can handle this style.
It's pretty heavy, 80" is a bit long, I was planning on cutting mine
down to 66 or 68.
So don't cut it in half, it's pretty easy to find 40 to 50" OS, but long
pieces are very rare, sounds like you found a nice one