Should be just beside the battery.
go to: www.goldwingdocs.com
No
Water cooled.
Iraqi the front of the engine at the bottom
Honda 10w40 works well
This bike takes about 3.7 quarts.
Fuse box on 1979 Goldwing is in small black box forward of the fuel tank filler cap.
'79 is a 1000 cc , '80 is a 1100 cc. You would have to compare the both. Or check with the parts dealer.
The fuse box on a 1981 GL1100 Goldwing is located under the seat near the battery. It is sealed in a water tight box to prevent damage.
Follow the lower rad. hose. Its in there. Have to remove the rad.
10w40 will do just fine. I use Motul.
21 psi