New HEX Code = New Custom Tunes?

[MileHigh04SCREW]

So I've been playing with the stock edge tunes while I patiently await my re-written custom tunes, and my serp belt is squealing at WOT shift 1-2. I'm reading a lot of good reviews on the Gatorback belts. Do any PHP members recommend them?

I think I want to change belts this week (truck has 60k on it, so about the right time), and I cannot, for the life of me, find a consistent belt length recommendation (i've seen 101.5 -> 103.25") ... that's a big range.

I have a 2004 Supercrew FX4 , new body style, 5.4L 3-valve. Anyone know off the top of their head what length or Gatorback PN? I'll keep researching...