Thanks for the listing Lastgas.I knew of about 15 versions so yoy just added to my knowledge.Scott did an article in PCM awhile back on the crowns.What I noted ,if I remember correctly,is that the grey crown was diesel and the green was a tractor fuel.

I noted that because I chase diesel and collect "OLD IRON" as in tractors and trucks.Man,if I could get a green crown that might inspire me to grt another JD Mod A!!!