i have a 85 305 tpi and i read that my car did not come with roller rockers and that they make a difference.so i am planning on putting a cam in and since the valve seals are goin im just going to pull the heads off have somebody port and polish them and possibly install roller rockers.so basically what i want to know is if its worth it to change the rockers and what kind of cam should i use,i want a slighly rough idle and a good low and midrange boost.