Ok guys, I have a few more questions about the little gems.

Any help is better than nothing, so thanks in advance.
1.) what weight oil is used in the 3 speed rear end. Is it just same old rear end grease.
2.) can you get new clutch disks for these things? I can't seem to find one. Maybe I'm just not looking in the right places.
3.) what color were the grilles on the 73? I have seen them silver, black and white.
4.) are the headlights used in the 73 option a special brand and/or number?