THE BEST SIDE OF 4AGE BLACKTOP ENGINE FOR SALE

What other sensors need to I seem to incorporate more than the conventional 4age, inlet air temp and also a wideband sensor are already advised, is there anything else I should really add? When there is not a patch harness, how tough can it be for making my very own patch harness provided I haven't any preceding wiring encounter? Cheers Paul4AG Hug