Update about my next steps

I bought a car to flip but found out it came from an insurance auction and the 2.7l motor that is bad cost $3000 so I am putting in a 3.5l and turning it into a drag car.

First, I need to go to the junk yard and find a 3.5l Dodge or Chrysler RWD motor with a 5-speed auto with complete engine harness.
I thought about using LKQ or similar, but I need the harness to be uncut.

Hope it goes well, wish me luck.