You did remove the lower "tubes" to each carb right? Then is it a matter of sliding the carbs to the left just enough to get the trottle cables and choke cable off. Pull that vacuum line off of the No. 4 carb. The as you rotate the carb rack counter clockwise slightly also lift up a little on the front of the the carb rack. It is a tight fit but once you learn the technique it is very easy.
Remember as you move the carb body to the left, lift the front of the carb rack and rotate it slightly counter clockwise.
If you want to gain confidence BEFORE you take them out/apart, get the Randakk's carb manual, which gives you step-by-step color pictures/instructions on how to do it. I have his manual and my bike has his carb kit. I highly recommend it. Also don't forget to sinc/set idle,etc. when you're done, she'll run smooth.