Notice the tapered drift pin I used followed up by a straight pin for final bolt hole alignment. This is the first time I’ve seen these and I like em. The bolts also come from HL with heavy body serrated teeth lock/flat washers. This wrench is about 3’ long and really gave me leverage so I only hurt for 3 days instead of 6 days. I used a ¾’ drive torque wrench because the ole back ain’t what it used to be. The pin box bolts are grade 5 and get dry torqued in steps to 150 pounds. I also installed a hook and plug holder because I was bored. 2 self drilling black screws go into pre-drilled holes in the plastic cover and self drill near the pin box frame in the back. 2 plastic inserts go into these holes and allow white painted screws to be utilized for securing the cover. The Lippert 1621HD pin box has 2 - ½” holes near the front. It can be trimmed easily with aviation snips. I feel better now, the only burning issue which keeps me awake at nights now is, “what’s the auto position do on my crock pot” ? The plastic shroud is just that, some type of plastic, not fiberglass. This is why my TV/RV was close, too close for me. The pins on both boxes are against the fork, now look how much longer the 1621HD is. In one pic both pin boxes are side by side. The TrailAir is a nice pin box but it is shorter than the 1621HD and the geometry is slightly different, because of this my NBS (New Body Style) Chevy w/8’ bed was too close to my RV. It’s a lot more streamlined now so I expect to reduce my fuel burn (yeah right, lol).

Here are some pics of my TrailAir M15 pin box morphing into a Lippert 1621HD w/ plastic shroud (most owners go the other way).

Heart Box instaling