Alright guys I'm prepping for my full rebuild and I'm sorting everything I can to get it done and running with no hassle. I have a stock 2.0l fsde. I plan on running wiesco pistons with fs9 cams, also deleting Vics and getting the intake ported to match my head. I also am getting the head redone. Ex. Ported, 4 angle valve job. I plan on getting my stock Ecu flashed for MP3 from spicyorange. I already have a injen cai, and 4-1 headers. Should I have any problems with this setup running on the Ecu and get a ems later or would I need the ems right away? Also are the cams just a drop in or will I need to mod anything?