Okay , maybe I should just do the heads, and leave the dish pistons,bottom end alone. Let me ask you this. If I have 8.2 cr now, and I put a set of 1970 64cc chamber heads on it(I have a set of done heads), will I get much more out of it? Will I notice a difference verses using my 76cc heads?? I guess it will raise the cr about 1 point. I am not sure how much of a gain I will get doing this, and adding the cam and intake and headers.Neeed some more input. So far, I am gonna leave to he bottom end alone. Now, are my set of 64cc heads gonna do the trick? Also, the car came stock with an alum. intake q-jet. I have an adapter and a holley 650 I rebuilt, I took off the electronic q-jet. Do I need to get a new intake, or will the adapter work okay??