I've used several brands (Bosch, Autolite, Champion) with several different metalurgies (Platinum, Iridium, Copper) and electrode designs (V-Notch, Shrouded, Multi) and have always found the Bosch Platinum+ Single Ground Electrode has ALWAYS worked the best for my applications (1977 Datsun B210 1.6L, 1989 Jeep Cherokee Pioneer 4.0L, 1991 Jeep Cherokee Laredo 4.0L).
But then all three were OHV heads with the in-block camshafts, even though the Datsun engine had a aluminum head, so results may vary for other people's applications.
