If it were me I would say the 88 degree one because as you know the wiring fitted by ford for the cooling fans is shite and not up to the job, when the fans keep kicking in, in traffic for example the wiring gets fucking hot and tends to melt, if the fans kick in at 82 degrees they will be on more often hence heating up that wiring

so my advice stick to 88 degree stat, also keep an eye on your temp gauge as 4x4 stats are notoriously unreliable



Luciano