Looks like a 2100 to me (actually I think the thing on the top right in your picture is supposed to be some kind of altitude adjuster thingy that makes this carb a 2150, but same difference).
Take it apart, boil it in lemon juice, put it back together using the rebuild kit, and bolt it on.
What are you using for adapter plate, throttle cable, and air cleaner?
85 CJ7 258, borla header, Team Rush, MC2100 ,optima batt, Warn 8274, agr super box 2 & pump, T5 w/ B&M shifter, centerforce 2, superior 1 piece axles, warn hubs 2.5 in lift, 31" BFG MT
85 CJ7 258, A/C, T176, MC2100, Team Rush, Warn XD8000i, superwinch hubs, 3in lift 31" BFG AT/KO