Hello and welcome,
I did the Weber swap on my 86 Samurai a few months ago. I decided on the 32/36 with the electric choke. I purchased in from a outfit selling on eBay for a lot less than $350.... I think I paid $289 with free shipping and no tax. You also need to decide if you want to use the stock air filter or a small after market filter that is supplied. Should you choose to use the stock cleaner as I did the kit will come with a adapter for it. This is a kit so it comes with all you need for the conversion.
Hope this helps,
Dennis