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Select a quality battery relocation kit from a street rod manufacturer or a racer supply. We chose a Mopar Performance kit (part #P4349500) because it had the '60s period-correct look and top-quality components. It retails for approximately $100.
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After you've thoroughly planned the battery location including a trial fit with the battery, mark the holes that need to be drilled to fasten the tray in place. Make sure you don't drill into the fuel tank, fuel lines or anything else that's in the way.
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The Mopar Performance tray comes with tabs punched out of the bottom. To get our tray to sit flat on the '69 Buick Skylark floor we had to flatten one tab with a hammer. The tray was designed to work upside down as well if you need to elevate the battery for your application.
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Drill the tray hold-down bolt holes and then bolt the tray in place with the four bolts provided. Use large diameter washers on the bottom of the trunk floor. You want this thing to stay in place in case of a crash.
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Place the battery in the tray and plan the location of the cables. The holes in the trunk floor for the cables should allow for smooth cable bends and correct routing under the car. Cut cable holes with a holesaw and install rubber grommets to protect cables.
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We routed the positive battery cable over the frame rail and forward along the top inside edge of the rail. It runs past the front crossmember then loops back to the GM starter solenoid. The cable is fastened tightly to the frame with rubber cushioned clamps.
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Mopar recommends that you run a ground strap from the engine to the chassis and from the negative battery cable to the body. We also installed a Battery Mat from Performance Products that will absorb and neutralize any acid spillover.
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The finished job looks factory installed. Take your time and remember the sage advice?measure twice, cut once. Our Sears DieHard Security battery is now secure in the trunk under lock and key.
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