Going to need an entire harness out of a 96-up car, also new cluster, new fuel setup, new trans and some other things. 96 was when they went to OBDII and the motors are completely different and the bolt pattern for the transmissions are different. The Mark VIII swap happens in the 96-up cars alot because they use the same motors, or at least the 4V is a 95% drop in for those cars since the 4V and 2V are both modulars. It is NOT an easy drop in for the 95-down.
The swap is typically done with a full donor car like a wrecked Cobra or something so you can take EVERYTHING you need. In all honesty I'd stick with the Pushrod but that's just me. You'll spend more money and time into doing the swap then you would selling your car and buying something that already has a 4V in it. Or even a clean 2V with a blown motor to swap a 4V into.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.