I just have to say it.
Hate me, get mad, reply with obstinate attitude, I really don't care.
You would at the very least need a 2 door car for parts, as so much of the
entire car is different.
Wheel base.
Trunk is longer, roof is shorter, rear quarters and floors reflect same.
Interior panels, seat, glass, are all different.
Drive line has to be different too.
No way it can come out looking like a "REAL"' 2 door.
Swapping or changing titles is very illegal.
Not to mention extremely dishonest.
That 4 door is a nice solid looking car.
No reason not to sell it and buy a 2 door.
Save a ton of time, money, and effort.
If you think you will make a profit this, way you are sadly mistaken.
Just cuz you can?
Really?
Well go for it.
Be prepared to get totally disappointed and likely dissed on the results.