91 s15 cam?

so i was thinking about rebuilding my 4.3l and i have heard of people putting after market cams in but i dont really know much about them like what brand is the best or what size would give the best proformance. also i had planned on replacing my vaulves and because they seem to have a slight leak. any help on any of this would be much appresiated.

never mind i found what i needed. http://www.compcams.com/storemenu/ thanks.