Gen

Could someone please help me to identify these senders on my motor. I've read the FSM and could only figure out that I should have a Thermotime switch, sender to gauge, sender to ECU and something for the EGR. I just would like to know what is what. Thanks, Gen

'78 280, runs ok for the condition its in. Noticed some interesting items under the hood. Would love some info. First, what looks to be my vacuum advance for my distributor is blocked off with silicone. Was this a performance mod? Second, I think this is my thermotime wire. Not sure and can't seem to pinpoint it in the factory service manual. Lastly, what the heck is this doing here, a diode? Any help would be great. Thanks, Gen