Would I get any additional benefits with plug and play without tuning or not really? I know the best thing is getting it tuned but not within my budget right now.
Turn or push the button till it's in the run position,but don't start it,then push the accelerator pedal slowly to the floor 3 times.
Little tidbit for you,the 485 horse SRT 6.4's use the same exact throttle body as your 5.7 does.For your mods you don't need a throttle body,it's the very last thing you do,after doing a cam/headers/ported heads/higher stall torque convertor etc.,and even then it's still not a huge requirement on a 5.7
Whoever told you,you needed a ported throttle body,doesn't know their ^ss from a hole in the ground.If you haven't bought it yet,don't ,save that money and put it towards a set of long tubes.