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One, skip on the Bosch. They're great plugs for easy driving and lasting a long time. However, they aren't the highest performing. I switched over to the Champions, they have a larger center electrode, and which helps make a noticeable difference in the power. The Champion platinum plugs run within a few cents of the Bosch platinums.
For gapping, they'll be gapped to the factory spec, which is .45". You'll have to gap them up to .55" if you want to do that. You could even try .60" if you wanted to, I sold my first Camaro before I got there. The 3.8 uses .60", and the exact same coils as the 3.4.
Lastly, with the changes that you're doing, if you haven't reset the PCM yet, wait until you have them done, and then do it. It just starts everything off with a clean slate.
For gapping, they'll be gapped to the factory spec, which is .45". You'll have to gap them up to .55" if you want to do that. You could even try .60" if you wanted to, I sold my first Camaro before I got there. The 3.8 uses .60", and the exact same coils as the 3.4.
Lastly, with the changes that you're doing, if you haven't reset the PCM yet, wait until you have them done, and then do it. It just starts everything off with a clean slate.
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