If he's talking about the Reese Goose Box I have had one our fifth wheel for over 2 years now. Lot's of info about it, just Google it. It replaces the pin box and all that is needed for your truck is a goose neck ball and a couple of hook up points for the safety chains. It has a couple of shock absorbers and an inflatable air bag. It is the best riding hitch I have ever owned and that includes a few. Reese does list the frame boxes it will fit so he would want to see what box yours has.
JimT
2020 Jayco Pinnacle 32RLTS, 2020 Ford F350, Platinum, 6.7 diesel, 4X4, CCLB, SRW, 12,400 GVWR