If you can hook up the summits and the factory ones, I'd recommend doing that and leaving it. The summit oil pressure and water temp are mechanical gages and probably a hell of a lot more accurate than stock. Find a mid 70s dodge ram van with V8 for a nice factoryTee adaptor for your oil pressure. Use the tubing and electric sender on the tee. I recommend getting copper tube for the mech oil pressure if you intend to keep it hooked up. I have the same set of summit gages. Plan on keeping em hooked up when I get to that point. Dual redundancy especially with the 2 most important gages. Oil pressure and water temp. If you are running a stock mopar mid 70s radiator there should be a threaded hole in the top tank for an emissions device, use that spot for your aftermarket gages water temp probe
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