What is the sensor called on the back of the engine block passenger side please help

[RAU03MACH]

In other words you would have to do some research on installing

 

[RAU03MACH]

Or conversion

 

[Project Grey94]

Thank you so much y'all especially you sir has been the greatest information that I could ask for now will not kick this dead horse no more everybody enjoy their day stay safe God bless