honestly tho, wait on the supercharger till you get these done:
short throw shifter
gears (4.10 is what i went with)
exhaust
suspension
cams
stage 2 port/polish heads
forged internals
then you should be set for a supercharger
this is the plan i have laid out for my car. i have plans for a kenne bell so some of these mods are to prepare my car for it.
but then you could always skip the forged internals and get a KB with 9psi or less and a REALLY GOOD TUNE and theoretically you should be alright (information based on what i heard from ppl here on stangnet)
although i have yet to get most of these mods so what do i know
just my .02