I went from a 3.4L 4WD AT 1996 T100 to a 4.7L 4WD AT TUNDRA with no regrets.
It is my daily driver and I get 15/16 mpg with my heavy foot and 18 mpg + when I lighten my foot.
I added JBA headers and nothing else.
As much as I loved my T100 I would not go back to it as my primary vehicle.

HTH ~