Wondering what U joints would be in my '69 300, auto trans, standard 440 / 350 hp engine. I'm guessing 7290, but I think I recall our '67 Fury, auto trans, 440 / 375 hp engine had 1350's? Does anybody know off hand what it came with, or if not, how to tell the difference? I'm pretty sure no 440 cars came with 7260's?

Hi 3 , You should have 7290s in that Vehicle . The Big 1330s Style U-Joint came in IMPERIAL . Ronnie

My '68 Fury and my '68 300 both had 7290 u-joints.

You can measure them too- https://www.doctordiff.com/1350-to-7290-conversion-u-joint.html

Use Spicer lifetime ones - solid - no grease fittings.

Thanks guys! Now all I have to do is convince my self to part with the money.

Your best bet to make sure if you have 7290 or 7260 is measure the width of them Never say neve when it comes to any brand of U.S. made cars

2 1/8 or 2 5/8 is what I remember from back in my 'parts man' days.

Correct