Welcome youngsvt
. First post in 1.5 years.
"I have a 2000 Contour SVT with 71k. The only engine code I am getting is 0430. From what I have read it seems like I should take advantage of the 8year/80,000mile emission warranty/ford's free cat giveaway."
Hate to disappoint you but it is a reprograming of the PCM to increase the "band" at which the code for inefficient precats come one. Unless the precat is too far gone and the reprogramming does not work, they will not give you a new precat. The reprogramming just postpones the inevitable (new precat) maybe until the 8/80 is past.
"I changed the plugs, wires, fuel filter all around 60k."
Good idea.
"Would the 02 sensors"
Sometimes but you usually get a O2 code if it is a bad O2 sensor.
,"...under moderate/hard acceleration at above 5k RPMs the engine is losing power. I attributed this to the aging fuel pump, but could it be related to a plugged catalytic converter?"
Could both or either.
One strange thing though, most of us get P0420 (Bank 1 firewall side) before P0430 (Bank 2 radiator side).
Yes, do send it in and see what they say. Because if you are past the warranty period, you won't even have that option. (my P0420 first came on at 8 years 1 month, 66k miles).
Good luck and good night.