true plug and play!

Technically you don't need a wideband O2 sensor to run megasquirt, BUT the wideband O2 sensor make tuning a million times easier. Virtually every article I've read on tuning strongly suggests a wideband O2 sensor. A narrow band O2 sensor is really only useful for limiting emissions while cruising down the road.

Also you really don't need two wideband O2 sensors. A single O2 on a single bank is sufficient. Of course this assumes that the left and right bank are getting essentially the same timing, and fuel metering. If you have a homemade intake or are worried that one bank might be lean or rich the second O2 sensor would be helpful, but for most of us using a factory intake manifold the likelihood of a lean bank is much less likely.

"No Lift Shift" is also known as Flat Shift. For those running manual transmission Flat Shift allows the driver to keep the accelerator foot on the floor while you shift. As you push the clutch in to shift the computer will enact a rev limiter to keep the motor from over-revving.

I would assume (always dangerous) the EFI source should be able to enable the flat shift option on their version of Megasquirt, though it probably requires a custom harness which could increase cost substantially.

This setup from EFI source looks pretty good. I've already bought a kit from DIY Autotune, so I look forward to someone else sharing their experience.

Regards,

Joe Dokes