Need some help...5.2L

Thanks for all the replies, some great notes, the power problem on the 5.2 was when the 31 inch tires were on it, it just does not have any balls. The 35's did not help....lol. Anyone have any 4.56 gears kicken around ...dana44 in front and a 9.25 i believe in the back. Was wondering, it seemed to loose some balls when i removed the throttle body out of the 5.2 and replaced it off a 360.....do you think that would cause an issue. I would think the ecu would have readjusted itself after pulling the battery cables off for awhile. Tires and rims are new...so they are not coming off he says....lol. later all and thanks