stiffy07

i have a 96 cx with rear drums and i wanna do a conversion but dont wanna pay a ton of money for the conversion. i was looking around on various sites and came accross a post for both rear lower control arms off a 99 si with the full brake assembly still attached (rotor, calliper, etc) and still had the parking brake line. i went to the honda dealership to look up the part numbers for my cars lower control arms and the ones for the si and they were different. my question is will the si arms bolt right up to my chassis? if so, what else will i need to do as far as brake lines are concerned?