The wires go way forward by the rack, then up, then all the way back to the 10-pins. You can simply re re-route them down the back of the motor and buy yourself more than enough length without having to cut, solder, crimp, or insulate.
They make o2 sensor harness extensions that are plug and play
they had no chance of reaching, it was about 20in too short so i started cutting and extending yesterday.
They have every chance of reaching with length left to spare, if you simply re-route them, unless you're putting the O2's back by the mufflers.
if they fit why do companys make/sell extentions?