I would not even bother with the 3L PCM.

The timing and advance curves are set for low octane, ATX use. Not performance minded in the least.

What about the PATS?

There is absolutely no reason to go to a returnless fuel system. Not that it would even be very easy or cheap to do such!

2000 SVT #674 - Check it out!

Whoever coined the phrase; "If it ain't broke; don't fix it" ~ Just doesn't get it...