Dave the part numbers are different but I don’t know what’s different between them.
What could be different is the grills. The black grill (snout) bolts up on each side and under the lip of the middle of the fender.
Gotcha. I see that the 88 nose sticks out further than the 86 by about 2 inches or so.
It looks like three tabs on that nose would line up and mount noses on either year fender. Overall, the fender looks to have the same mounting points to the frame based on the honda parts schematic at hondaservice.com
Thanks for the help!