j30 hubs on s13

[slidewayz350]

I have tried searching and I was wondering to use the j30 hubs on a s13 do I just push in the bearing and have the hub machined for the retainer clip or do I need this seal. Please any info would be appreciated.

Nissan S13 Front Hub Grease Catcher 240sx 180sx Silvia (http://www.frsport.com/Nissan-S13-Front-Hub-Grease-Catcher-240sx-180sx-Silvia_p_18188.html)

Thanks,
Jason