The weber kit for a 2.3L is different than for a LUV. The adapter plate will not fit at all and the fuel line input is setup to come in the other side. (among other things, but those are the major ones) Calmini does have a 1.9L carb kit that should mostly fit, but I'd go with
http://www.carbs.net for a weber kit designed for the LUV based on what I've heard about them here and elsewhere. Calmini bumps the price a bit more and you can get a kit designed directly for a LUV, no spare ports added for stuff you might not need. I think some of the later Isuzu kits have the evaporative emissions port on the carb or something.
If you already have a manual choke and can deal with that just fine you can cut a bit of the price on the carb by getting a DGV model with manual choke instead of a DGEV.
On the fan, just measure your fan shroud if you have one, maybe consider getting one if you don't. (Should find one fairly easy in a junkyard, helps pull more air through the radiator) Make the fan you get a little smaller (like an inch) than the shroud, or a fair bit smaller than would hit anything else if you don't have a shroud.