the other day i changed my spark plugs and fuel filter and somehow either bumped something or broke it cause all of a sudden my temp gauge isnt working. can anyone shead any light on what i could've hit? theres a wire that goes from a clip on top of my thermostat housing to the 2-wire plug that goes on top on the carb. (4-barrel roch) could that have anything to do with it? what does that wire do? where would the temp sensor be on a sbc 305? thx!