bert ball spline u joint?

[langdonracing48]

Dumb question, but my buddy is running a Bert ball spline with a fastshafts drive shaft. I can't find what u joint he needs to buy in any of my books, and I'm not anywhere near the car to measure. Anyone know what part number he needs?

[JustAddDirt]

Should be a NAPA 369
I believe it should be the same as the yoke on a quickchange, or the small ford u joint.

[langdonracing48]

Thank you!