I needed to finish up the front end, so I got the headlights in then attacked the grille. I learned quickly that is not a one dude job, so a buddy came over to help. Maybe everyone else knows this, but what seemed to work best for me was to fully assemble the grill first off the truck. First I put the insert on, emblems, then the end and center support brackets and tightened everything up. As stated above, I used rivet screws instead of regular rivets. I went that route because i liked the look better and it gave me more ability to shift things around to get it to fit.
Link to rivet screws:
https://www.ebay.com/itm/25-pcs-10-3...72.m2749.l2649
I used Keyparts brand aluminum grille and insert that I got from Wes at Classic Heartbeat.
I had to loosen all front fender screws on the core support and still wedge, pull, stretch, tug, push and persuade, but we got it on with only one tiny scratch that you can never see. Took about 2 hours.
The bumper was straightforward and did that (as I do with 95% of this) by myself after my buddy left.