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Re: 1g head on a 2g engine swap
The only thing different is the harness. Internally they are basically the same. 90s, or 91-92 GVR4s, or Hyundai's use a pigtail that attaches at the firewall. 91-92 use a connector right at the sensor (just find the harness end and you can use it). 93-94 use a slightly different pick-up inside the sensor (hall-effect vs. optical) but use the same harness. They will ALL interchange. The big reason for switching to a 1g sensor is the fact that you can combine all the sensors into one package, and have the ability to adjust your base timing.
Wiz
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