A few questions:
-Anyone run these?
I ran the Mikunis for many years.
-What are your experiences?
I fiddled with them for a couple years trying to get them balanced. Don't waste time trying to do it yourself. One day I took it into a shop that builds circle track racers, they put it on the computer and it ran like fuel injection from that day forward. Oh the years of wasted frustration.....
Get it set up by computer and you'll love it. Expect lots of power. Also expect crappy gas milage.
-Do they run steady on hills?
Great on side, up, or downhills.... once you have it correctly dialed in.
-Any problems besides hanging low and sucking up water?
They're always setup for larger engines than the 1.3 or 1.6 Samurai. Downsize your venturis to a 28 or 29mm and you'll keep it from 'loading up' all the time. Very easy for the DIYer.
-Any good places to buy them? The only place i've seen so far is Calmini for $800. Someone has to sell them cheaper.
Do NOT buy the Mikuni. It is a good carb, but it has been out of production for several years now. You cannot buy replacement parts for them, seals, jets, etc. Get the Weber DCOE dual sidedraft. Same great design, but it is under current manufacture.
'Fast Freddies' is a place I had good luck with in the past on buying dual sidedraft parts. They advertise in 4x4 magazines periodically and are located in So Cal.