Hey Russ,
With a long bed the difference on pin box length won't be an issue, but we will need to check a few other things to make sure that you're getting the correct fit. MORryde has two capacities for their upgraded pin boxes; one for the overall pin box capacity, and one for the shear spring capacity. The overall capacity can exceed the GVWR of your trailer but you'll want to make sure you fall within the shear spring capacity range for a smoother ride quality.
The MORryde Cushioned... view full answer...
The closest side marker light we have for those dimensions is the LED Trailer Clearance or Side Marker Light with Reflex Reflector item # 328-K-51. This oval light measures 4" and has mounting holes that are 3" center to center. view full answer...