I glanced over those. One, I didn't see any bungs for the pre-cat O2s. Second, the primaries look like they are only tacked in place on the flange. Of course, this is the pictures I can find.I am goin with Dynatech when I do it
Quite certain they have everything you need. I would contact them before you make the assumption that the o2 sensor bungs aren't there. Jarrod has a set on his.
They are high quality, not just tack welded

