Forward light harness grounds, Ric mentioned this. On a 70 there are grounds on both sides by the headlights. Also the voltage regulator ground, should be mounted on driver's side of rad support.
Don't think your chassis ground is correct Ric, not that it doesn't work. Chassis ground to battery should be through a short pigtail off the negative battery post to the passenger side fender. Engine ground is from battery to cylinder head or block.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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