Personally, I'd recommend going through the local junkyards and finding an older ford with a Motorcraft 2100 or 2150 on it. Your looking for one with 1.08 venturis (its cast on the drivers side of the carb). Rebuild it, buy the adapter for ~$15 and throw it on there. There are full kits for these with freshly rebuilt carbs, the adapter and the air filter, but you can generally save money by putting it together yourself.
1990 YJ Islander, 4.2L MC2100 DUI HEI, 2.5" RE lift, 31x10.50 DuraTracs, HandenFab rear bumper / swing-out, Tough Terrain off-road camp trailer.