FMIC for $400 involves cuttong a hole in the chassis, trimming the fan blades, cutting the front bar and it's support.
$150 R34 GTT side mounted stock intercooler is bigger than the R33 one in each direction, yet is a straight swap (bit tight but still straight swap).
it has been proven number of times to be good for cooling and flow for around 220rwkw.
your stock turbo will not do any more than that anyway.
$150.
remove some hose clamps, remove some bolts, remove old intercooker, then reverse the steps with new intercooler.
ALSO, SAFC will be tuned on a dyno.
that is when I would increase the boost. not before.
better safe than sorry.
strap the car on.
increase boost to 10psi, dyno run, get result.
then the tuner goes and makes the adjustments and runs it again, then same step over and over to find the best compromise.
expect around 190-200kw
Then post a thread on here about your result so everyone can take out there online penises and compare.