My 75 Fury Sport has the standard gauge cluster...including an idiot light for the oil pressure instead of a gauge. I want to convert this to a cluster that has the tach. I've been gathering parts for a long time. As you know, all of the gauges have to change out except the speedo - i have them all, including the tach. I also have the necessary bezel and an NOS circuit board that goes behind it. I'm thinking that all of this should pretty much plug right up. Is there anything else that would have to be modified to make this setup work? I'm guessing I'll have to run some kind of line for the tach, but not sure if the new circuit board takes care of that or not. I'm assuming that the same harness connections will operate the different gauges. Any comments?