Shaft diameter 3 inches, length 53-15/16 inches measured on U-joint centers. Used and 'as balanced' from the factory.
Ask about slip yokes. Shipping is oversized due to length.
*TRIVIA* All manually shifted H-code 351-2V engines were 3 speeds, you could not get the 4 speed with that combo. Read about it in Cougars by the Numbers book.