Ok guys. quick question

I picked up a set of Welds for my stang and need the right lugs for em. I found the right ones from Summit but they're on backorder till end of May . I need some help to find out which ones I need from Jegs.

http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_749583_-1_11611

I want to order them tonight if I can find out which ones I need, I think I need the one below or maybe the one I listed under it, although I don't know what Duplex means.....Just want to check with what you guys say first before I order. Thanks

927-601-1416 or maybe.....

927-601-1916

Thanks, but I just got the stock studs and I want the closed end lugs, they look alot cleaner. Which ones for the stock studs tho?

Anybody? Please