Um ok,
Here is the ratios:
2.84:1, 1.55:, 1.00:1, 0.70:1
Looks good to me, just need lower gears in the rear.
I heard the 5 speed just splits 1 & 2 and was designed to help Ford Explorers tow with weight.
Truck was so weak the dam thing could not get into 2nd gear from a stop (too high ratio)
So the only gain I see is closer ratio trans.
The W in 4R70W means WIDE RATIO