Ya, mine also may need an engine block (need to find out why it burns oil, could be just a PCV valve hopefully) and a catalytic converter (in a California compliant state).
I have a 6 cell NiMH charger and a capacity tester. I tested all the modules and one just wouldn't stop acting like it had a flat cell. I replaced that one and two others that had the lowest capacity with three newer modules. I haven't driven it enough to really see how it'll react with the newer modules.
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