In light off the posts over at newcougar.org I am a little confused about upgrading to the lower intake manifold that BAT will soon be offering complete w/19lb injectors. Right now I already plan on upgrading to the dual honed svt upper IM but I don't know if the lower will be worthwhile. A list of my mods are below as I am unsure if I need larger injectors to handle the extra power. Also there are lots of rumors going around as to when ford switched over to a returnless fuel system,sometime around 5/99? Any answers are appreciated thanks!

1999 Mystique 2.5 ATX (prod 8/99)
KKM w/CAI
Pro Flow 75MAF
SVT TB
MSDS Headers/Y Pipe
High flow Cat
Borla Catback