THE BEST SIDE OF 4AGE 20V ITBS

What other sensors really should I look so as to add more than the common 4age, inlet air temp plus a wideband sensor are already suggested, is there the rest I need to include? When there is not a patch harness, how tough can it be to generate my very own patch harness offered I don't have any prior wiring practical experience? Cheers PaulThese ar