Pratt Whitney R-2060 Yellow Jacket

[AMCKen]

What is the correct bore a stroke for this engine? Two sources have different figures.

Pratt Whitney R-2060 ? Wikipedia
says 5 x 5.25 for 2061.7
yet that site has the below for an external link and it says different:
http://www.enginehistory.org/Convention/2006/Presentations/McCutcheonK/PWLC3_1.pdf
- 5.25 x 4.75 for 2056.5

thanks all, and Happy New Year. : )