Yeah, that's right Alex, with Guts boosting Facade, it would have a base of 210, which would make it pretty good in Machamp's hands.
But, you could always swap the Toxic Orb for a Flame Orb if you wanted, which I believe would make Machamp last a little longer in battle, which is up to you. Besides that, Guts prevents the attack drop when a Pokemon is burned, so just go with what you think is better.