i recently read in here that the non r/t's have a better flowing head than the base models. will the 1st gen r/t head match up to my o2 neon es? is there anything else i could pull from a 1st gen r/t that would benefit me in putting it in my car? is there a way to change my computer over to the r/t style to take advantage of the better fuel mapping? is the 52 mm automatic neon tb the biggest stock that will fit in my car?