So⦠the gas tank skid plate is different between regular and extended cabs, just to point that out since it wasnāt mentioned.
The transfer case skid plate, if memory serves me correctly, they are metric bolts and a pair of captive nuts on a bar for inside the frame on each side. I donāt remember what size, but if you donāt have the bars with the captive nuts, it really doesnāt matter much. Just use some bolts and washers with nuts on the top side, 8.8 for metric or grade 5 or 8 for SAE.
The gas tank skid plate uses the springy U-clips in two places on the frame rail and the front gas tank crossmember plus one bolt and nut on the crossmember by the rear gas tank strap. Most hardware stores donāt sell a U-nut in the correct size. I actually ended up hogging out some of the holes and putting a rivet nut in. Most of them you can manage a bolt and washer with a regular nut.