This question tells me that you don't have much experience with these parts. If that is the case then you either need to find someone you trust to help you out or just start by trying to bolt some things together so you can figure out how they go together.

You're questions are all over the map which is why you are getting replies that are all over the map. The answers you get on Moparts will be very confusing for someone who doesn't already have a really good understanding of how the engines go together.

For example, the EZ head and the TF 270 head use extended intake ports. The other heads you are asking about such as Stealth heads do not have extended intake ports. So you are not comparing apples to apples.