Fresh engine, wiped cam? Tick? (new pics added)

Honestly... I did see that! I was just wondering if someone else would say anything. Would that little bit make a tick??
Also, I have read to look into Napa lifters... I don't know? Is a lifter a lifter? Napa seems like it would be cheap. I think Summit has there own brand too. I don't want to get junk.
will any Hydraulic Flat Tappet, work? It seems like I should stick with Lunati... (although more expensive)
Is .015 for the pre-load is o.k assuming it was done correctly?