Coolant sensor

Hi, I have an 84 vette that i'm working on. One of the parts that needs to replaced is the coolant temp sensor. I have the new sensor and located the old one. Now my issue is it's extremely tight of an area to get to, so i can't quite reach in there to take out the old one. is there any better way to get down there to replace this? My otehr problem is that the old sensor broke off inside the connector and i can't seem to get out the remaining piece. Does anyone have some suggestions?

thanx in advance