They sure do! The Reese # RP30156 adapter is exactly what you'll need to provide base rails for your # C16541 Curt A20 5th wheel hitch. The adapter drops into the pucks, which might require a little fiddling to get adjusted the first time, but once adjusted it'll lock down into the pucks perfectly. Then, mount the hitch to the adapter just like you would to a regular bed rail.
If you don't already have a 7-way trailer connector set up in the truck bed, you can install one using part #... view full answer...
The Camco UltraGuard 5th Wheel Cover, # CAM45755 has dimensions of 34' long x 110" wide x 110" tall (front) x 98" tall (rear). Based on the dimensions you provided I think it is best to consider the Camco UltraGuard 5th Wheel Cover, # CAM45756 that has dimensions of 36' long x 110" wide x 114" tall (front) x 104" tall (rear). That front height of 114" is better suited based on your provided numbers. The length can be pulled in and adjusted with straps. view full answer...
Currently Goodyear is one of the few trailer tire manufacturer that makes tires in the USA and the only one that we carry. Unfortunately they do not currently offer a tire size of 235/80-16. view full answer...