Im putting a 2001 motor into my 2000. The 2001 has two O2 sensors in the exhaust manifolds and the 2000 does not. The holes are in the 2000 manifolds but they have been capped off and I see no wiring or connectors, not sure if this was done at the factory or by the previous owner. Just wondering if it matters installing the new motor with or without the manifold sensors. I have both wiring harnesses so I can go either way.

Thanks!

 

I'm going to go out on a limb here and say that as long as you're using the 00 ecm you're fine using the 00 harness.