96 GT. Theft and PCM question

If I replace the PCM in my 96 GT will it interfere with the theft crap?



Im basicly getting this idea from this link http://www.stangnet.com/mustang-forums/758532-auto-5-speed-swap.html

where he mentioned

"I purchased a 5 speed 96-97 computer on ebay. code for pcm is ZXA4 you can use ZXA3 and maybe others. If you need others call the parts dept. at your ford dealer and ask about 5 speed 4.6 pcm numbers.
(The 96-97 mustang gt's have a the P.A.T.S.-passive alarm in the dast cluster, 98 mustang gt has it in the pcm. This is very important for this swap. This is my one spot I should have further researched.
"

Sweet, Thanks.

A couple of questions...

When you say encoded key, is that a key thats cut for your car but hasnt been programed at all? Or does it need some type of programing?

Also, if I was to have the original key to the PCM I was installing, would it be a plug in play or does it need to be reprogramed anyway?

Here is why I ask....

I have a 96 GT that currently has a automatic trans PCM but the PCM has been reprogramed to a manual PCM with the use of a chip (cause the dyno tuner blew my original PCM and a auto one was all we could find at the time) Lets call this PCM #1.

I would like to put in another PCM (manual trans one) and use a SCT flash tuner to do some more tuning, lets call this PCM #2

If I install PCM #2 and program keys for it can I latter return back to PCM #1 without having to reprogram as long as I'm using the correct key for PCM #1?

Hope that make since... Thanks for the help.

BTW Have you seen this before http://www.stangnet.com/images/stories/docs/sn95_TSBs/01-06-02.pdf

If thats correct and im reading it correctly, the 96 and 97 stang can have the PCM swapped out with no changes to the keys or pats. Hmmm