Hello I’m planning on Camming my 2003 Mustang GT 4.6l 5speed can someone help me with what I’ll need to support the cams or what aftermarket parts I should have before camming I already have a full exhaust and throttle body with a cold air intake and have been told to get 355 gears is there anything else I should have? Im thinking either stage 2 or stage 3 comp cams

Please let me know you recommendations thank you