I didn't pull the head off, but what I could see, the piston and cylinder wall look good. Just snapped rod off close to crank, the part of rod connected to crank broke two pieces. Bolts holding end cap didn't come off.
Don't think the motor will be fixed. Got another 6.75 hp briggs and put it on the mower he likes, a John Deere push mower.
I can feel a few scratches on just one small part of crank. Many scratches all over the place on rod bearing surface.
I really think he was running motor too fast. The motor only runs one speed. No speed control for carb. So I think the governor may have been set too fast, broken down old oil, little low on oil. Really don't think it was a defective rod. More like bearing failure for some reason.