On your pinging, my '92 3.9 runs just fine on 87 Octane with the stock
SBEC and 91 with the Mopar SBEC. I had an '87 Mazda B2600 lump that
started pinging on regular until the O2 sensor was changed, which was a
major pain in the a**. The pinging started slowly and got worse and
worse.
Larry Elliott, '92, 3.9, 4x4, 5 sp'd, LE
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