Welcome to the forum (again)!
Definitely take care of the steering head bearing grease issue right away - not only will it make the bike safer to ride and better handling, you may avoid damaging the bearing races and not have to replace the bearings, which require pullers and/or MIG welder.
As long as the floats in the carbs still work properly (.ie don't sink) I wouldn't replace them. The alcohol kit with the independent float arms requires new bowls (read:$) and the new black floats are a crap-shoot in my book. Have an R100/7 with the alcohol floats and one or the other is always dripping gas, flooding, or having issues despite numerous attempts at fixing it. My '82 R65LS is still running standard floats/arms and it works great - been running these for at least 10 years since I resurrected the bike.