I have seen a few cruisers with the old style aftermarket RPM gauge on the steering column. It doesn’t seem to detract from the OEM look. Mind you I DO NOT want to cut into anything!!. My question is 2 fold; how would I find one or what would I lol for that has shat style. And second how would you hook it up to a system that never had it?! I’m running an April 1977 FJ40.