OT: Identify these sensors.....

[72gmcshorty]

I have an 86 Buick Regal with a 305 in it. I think its the same motor as Cutlass and so on. I have 3 broken sensors on the front of the car. On the water neck there are two sensors that stick out. I think they are both F shaped. I think they were part of the emmisions stuff. There was also one to the immediate left of the water neck not sure what it looked like. Anyone help id these and if you have this kind of setup could you please post a pic because I need to put my emmisions stuff back in. Pics with routing of hoses into carb would be helpful too. Everything has been torn out and mickey moused together again. Thanks.