Yes, very cool. I'm interested to see how much of a difference the CR top end will make.
As I recall, the early ('74-'76) CR250 Elsinores were rated at 33 hp, I would assume at the crank.
My uncle bought a new leftover '74 CR250 still in the crate in '76. That was a bad a$$ bike. They had a reputation back then of hurting people who didn't give them the respect they deserved.
He let me ride it one time when I was about 10. What a freakin' animal! It certainly left an impression in my motorcycle addled 10 year old mind.