Suggest getting a donor 94/95 car because the pushrod is not as drop in as ppl think to a 96-up car. You'll need the entire harness and a bunch of other stuff. Not to mention you'll need an aftermarket controller for the C4 trans or just go full manual valve body.
I personally wouldn't do it but that's me. But $1200 is not a bad deal for the 351 and trans depending on what all is done to it.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.