I wouldn't bother spending the cash on a B18C5 short block....you say you want to go f/i...well in that case you will want lower c/r. The B18C1 block will give you the same displacement as the C5 but @ a lower cost.
my suggestion is use what you currently have and just spend your cash on a build up + turbo kit...if you really want to increase displacement then go with a gsr short block and save some dough
BTW, I will have a B18C1 motor(just the motor, no mounts/tranny or ecu) for sale very shortly and will sell the short block and head seperatly....only thing is that I'm in Toronto Canada and shipping to the states will cost you...still way cheaper then a C5 short block though