4.6 swap

Hey guys new here looking for advice...

Sooo I have a 2001 mustang GT convertible automatic with the Windsor 4.6L And the 4R70W transmission.

My motor (motor A) blew at 154,000 miles due to timing chain guides
I bought a 4.6 (motor B) out of a 04 grand marquis turns a out it’s a Romeo....with 100,000 and some change

I swapped the throttle body, egr and vacuum lines, exhaust manifolds, motor mounts, thermostat sensor, alternator, and I believe I had to add a pulley to the top left of the motor

After playing hell to get the tourqe converter free from motor A.
i go to bolt all this up and the flex plate and tourqe converter seem to be different

all the same amount of teeth, same size diameter and same size center hole

the motor a flex plate I believe it 6 bolts but has a different bolt pattern for the crank

so I used the motor B flex plate put it back on and tried to put the tourqe converter on it and it seems to be too small for the flex plate...

I’m goin on a whim with this swap... is this even gonna work? Is this car even gonna run with this motor in it?

To be honest I’m not quite sure if it has had a swap or not but it definitely has a Windsor motor

maybe because my door sticker says 06/2000 which in turn would make it a 01.... is t that when they started puttin Windsor’s in mustangs?

I’m not sure I’m just gettin into the swing of the GT world
I’ve had soooo many mustangs but majority were v6s and this one is my 3rd GT and this is the most I’ve had to do to a mustang done a couple 3.8 swaps but this is my first GT swap

was there any other parts I supposed to swap bc I don’t have the old motor any more and all the money I’ve got in this car I’m ballinon a budget now lol