Reply to d4e:
You might try Gulfway Insurers Bayonet Florida 800-940-5010.They insure historical vehicles,it is worth a try or another laugh.Knowing our fine friends in California you will probably have to license it and put lights on it too.
I already plan on putting lights on it...brake lights too! It has a triangle.
I already had some crackhead almost plow into the back of my Farmall H....and I was towing 1500 pounds of road drag/sled with big orange cones and reflectors all over the d@mn thing! (two 10' sections of 110# railroad track under a mobile home a-frame tounge/hitch. + a few bus brake drums piled on top)
I could only imagine them not seeing a bright yellow Motor-Grader!
At least if I get hit on this I'll have the engine and rear wheels/axels between me and some bong huffin, cell phone yakkin, starbucks slurper in their cr@pcan Geo Metro.