You must completely separate the carbs. Remove the horizontal throttle plate springs and the small adjustment screw/plate springs before separating the carbs. After reassembly, the carbs will probably need syncing. Does the entire "T" need to be replaced - or is it leaking from the fuel tube/carb connection? If it's just the connection, go to Harbor Freight and get the almost 400 piece nitrile metric o-ring kit (blue box) for $10. I'm sure there's enough in there to replace the leaking o-rings. If it were me, I'd replace all the fuel tube o-rings and the engine head coolant tube o-rings before they start leaking. Heck, since the carbs are off, you might as well do a valve adjust too. (and I wonder why it takes me 4 hours to replace a throttle cable
Thanks Mason gotta luv Habor "once a year tool" freight. T is not cracked just leaking out of #2 carb.