universal joint fitment issue

On the pinion yoke the caps should be captured by tabs or machining on the yoke itself, and then the straps go on.

Nope, There is a machined groove on the inside of the cap that the snap c ring clips on the cap and a machined edge on the inside of the pinion to keep it from shifting around. There is no way I can get both rings on and have it fit.... The napa part in Canada was UJ347 and the US part number is nuj240-0369

Any one help?

Please!