XJwonders

I asked my friend to help me with the sye install, and he told me before we start, I should buy heavy duty u joints for both front driveshafts. I asked him what model and etc for it, he said he didn't know, he just asked for heavy duty ones from store.

I'm wondering if u know which u joints is better than others for xj's front driveshaft?

I read that moog is better but I can't find the part number.