I have a '70 CJ5 that came with a 4bbl Edlebrock Performer carb (on a Dauntless V6). I have a '76 CJ5 that came with a Carter AFB on its Chevy 350. They're both essentially the same carburetor and they're lousy off-road. I've tried all the tricks, such as, adjusting the float height, using the off-road seat springs, and plugging the passage between the two bowls. The tricks help, but even going up a moderately steep trail, the engine will cough and die (I think from raw fuel pouring into the engine). ITLKSEZ suggested trying an Autolite 2100, which he has on his dump truck. I ordered the last 2100 from RockAuto. I also had to buy a 4bbl to 2bbl adapter so the carb would fit on 4bbl manifold. I took off the Edlebrock 4bbl carb and installed the 2100 on the engine. I had to fab a bracket (the tall black bracket in the foreground) to mount a spring for the throttle return. I had to make a new fuel hard line from the fuel pump to the fuel filter. The new carb didn't come with an air cleaner bolt. The air cleaner requires a smaller bolt diameter than the bolt that secures the top of the carb. I made my own bolt, following ITLKSEZ's plans. The new carb works great. The engine starts right up and after testing the jeep on the steep back yard, seems to work at any angle. I searched the internet for a vacuum port fitting for the carb. I couldn't find one. I tried O'Reillys in Redmond and they didn't have anything either. I found a fuel inlet fitting and bought an aluminum tube at a hobby shop. I cut and bent a piece of tube and JB welded it in place. A rubber tube connects the vacuum inlet to the distributor. I'll update this post when I have more miles on the jeep. I'll also update this when I replace the AFB on the '76 jeep with an inexpensive 2150 clone off of Amazon.