I have a 99 and a 2000 Chevy and I'm about ready to sell my 2000 help

I have a 2000 Chevy Silverado 1500 LT four wheel
drive extended cab suicide doors both doors open
in the back I have a 5 3 motor when I start the truck
up in the morning and push the gas pedal it bogs
out it has no power in reverse or and drive I have
change plugs wires I've moved coil packs around
change them I have changed my fuel filter I have
moved fuel injection around I have changed air
flow sensor even took my whole exhaust out with
my Cadillac converter and changed the whole
piece and it still does it when it warms up it runs
like a beast when I first started it was saying on the
check engine light it was saying random misfires
multiple misfires O2 sensors and I have changed
all that now I just took my exhaust off still had my
manifold on and started it up and it still bogs down
so had no Cadillac converter on an O2 sensors on
it and it still doing it it has been doing this for 3
months I've got over $1,500 in it I have change the
spark knock sensors