Since you already have a half-top, and unless you need to have a rear seat, I wouldn't worry about getting a full top. Are you familiar with what is called a bikini top, windjammer and duster? You could use these during the warm months and then put you hardtop pieces back on during the cooler ones. Here is a link to some photos of what I did with my top. Album link
. It might give you some ideas if you decide to not get a full top.
I replaced the original shocks on my '91 Samurai last year and all four were completely shot and offered absolutely no resistance. With no sway bar, there was not any excessive bounce, but it did wander all over the road. Anything over 45mph was a little scary at times. I now have new Monroe shocks and steering stabilizer, and re-installed the sway bar. What an improvement - now no problems doing 70mph, just really steady and something I never expected it to be when I bought it.
First things to do:
1. Locate Ack's FAQ
for a good source of Samurai info.
2. Change all the fluids. Make sure your transmission fluid is rated GL4. Most on the market are GL5 and it is very bad for the brass transmission synchronizers. Pennzoil Synchromesh 3501 is relatively inexpensive and will work.
3. Wiring is another problem that should be tackled early on. You have 20-something old wiring and it needs a little rejuvenation. Grounds are a common problem and should always be considered when electrical problems are encountered. If the battery cables don't look to be in good shape, replace them. Also run a #4 or #6 cable from where the battery cable attaches to the engine block to your firewall. This will insure that you have a good solid body ground. You can search for "samurai clicky starter fix", "samurai headlight relay" if you have problem with the starter not always engaging or if your headlights are not very bright.
4. Only use NGK spark plugs. Especially on old carb engines, make sure that all the vacuum hoses are in good shape and connected correctly. Oil leaks from around the distributor are caused by bad o-rings.
5. Buy a can of Seafoam and follow the directions on the can.
6. Adjust the valve lash! Samurai's have solid lifters and people forget that they need to be adjusted periodically.
7. And welcome to the madness.
8. And where are you located? Might be others in the area that can be of help to you.