twntrbo

i am looking to buy a petitt unlimited chip for my fd in a week or so. i have 94 auto with streetport,dp,and the only upgrade i want to do is the highflow cat,catback and intake. could i get the chip programed for those mods and run the car till i can get those parts ,would running to rich be bad? also with the ecu could you feel the diiference in the power compared to the stock ecu? thanks!