I'm not sure. I do know it was the original shaft though so it was more than 40 years old and designed for an 85-95 HP engine. Didn't want to chance it modding an old shaft made for the slant 6. The 360 going to have just a "little" more HP & torque lol.
The yoke on the end of the shaft looked a bit smaller than the 8 3/4 yoke to. Just didn't seem like a good idea to recycle it considering all of the above.