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I found it.
Very very long story short
The rattle was unbearable, the truck was just impossible to drive with this damed rattle.
So we started taking stuff off the truck bit by bit.
Removed the whole dash the wiper valance and the wiper mech and wiper motor.
Packed rags behind all the plumbing on the firewall,
The sound was as if it was in the instrument cluster or slightly to the left of it in the vent.
sounded like a broken speedo cable.
Turned out to be the Bonnet poly carbonate protector
Im still not sure if it was an actual rattle or a wind/harmonics issue but its gone.