Grader blade frame length questions?

[Sarge 3,470]

I have a grader blade/frame that came with the 876 and would like to extend it for use on both of my tractors . Problem is the frame is the single short length to fit the 876 , too short for the 1277's long frame . I've dug through the posts , no luck finding actual dimensions so I can add the proper length to make it dual-purpose . I'm guessing at 6-8", just not sure . Also, what length and approximate angle is the original equipment solid lift links ?

Sarge