Need Help with the identification of Drive Shaft for 1970 RoadRunner 440-6 4 Speed

[RoadRunner1970]

Can anyone tell me what is the proper length of the correct drive shaft for a 1970 RoadRunner 440-6 4 Speed car with Dana?

Length or part numbers or any information would be greatly appreciated.

I found a guy who has some but need to make sure I get the right one....thanks

 

[68GTX4SPEED]

50.38" is correct length, diameter 3.25"

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50.39" sorry, and number is 2996560

 

[RoadRunner1970]

I am being told it should be 51.39" long
I found some that are 51.50" length but they have different yoke sizes that run from 4.25 and 5.0" and 5.25" which is correct for 70 Roadrunner 440-6 4 speed w Dana Rear?


2996560 it is 3.39" in diameter, 51.39" long and used with 426/440 engines, 727 and A833 transmissions and 9.75" rear ends

 

[68GTX4SPEED]

Standard Plymouth B-body 68-70 bigblock 8 3/4 is 51.5" the difference between 8 3/4 and a Dana is 1.12" so a 51.39" is just 0.11" shorter than a standard BB driveshaft.