if auto-->5spd cost only $600, you MUST go with that, at least i strongly suggest that.
nothing else, just install the kit WELL, not half-ass work. if you want, get s-afc to align your a/f curve better a little. but that's it.
some ppl gonna tell you to upgrade the fuel management that comes with drag kit (fmu and check valves), but that's gonna cost much, just try it out and then upgrade.
Oh, also, get 255 lph walbro and install that while you're at the turbo install..