340 slight dieseling when hot and hard start

Took my duster on a very long road trip from NH to FL (about 1600 miles). Along the trip it slowly started running a little worse. Now when its warm, it doesnt want to shut off immediately(it kind of sputters for a second). It never used to do this. It is also hard to start now after being run for a while (unless I let it cool down). I popped the air cleaner off immediately after it dieseling for a second one time, and noticed vapor/steam coming out of the carb, making me think its leaking fuel past after shut down?? edit: cranks forever before firing, like a flooded condition.

Edelbrock 600 carb(1406), stock manifold with adapterplate, stock exhaust, rebuilt motor with a small cam (unknown specs). Could the 2 issues be inter related, and if so... what would you suggest to fix it?

could it be the carb needs a rebuild?? or adjustment of float bowls?



thanks