"rebar in the ground. It works for houses right?" Nope. A car is a closed system. You must ground the spark plug wires to the car's ground. The negative battery cable, the engine block, any bare metal that is connected to the battery negative. That is why you got no spark. It needs to return to the closed system. Good move fabricating a harness to ground the spark plug terminals. That is the safest way to go. Take your buss bar and ground it to the engine block. It should work as long as you did not blow the ignition module. Keeping fingers crossed.........