That looks like a stock third member.
I have an aftermarket third member from quick performance that was built to handle 1000 HP.
It is a stock yoke, but the yoke isn't what broke. I wish you luck. With the tires you have on it , I doubt if it'll hook hard enough to hurt it. But if it leaves like this you'll be in trouble. All 8 3/4 pinion shafts are the same material.
Doug