Ok so I'm trying to figure out what year to get. I also want to see if it's worth me getting the HR and 07 or 08 . They do cost more money but I can have an 04-06 for much cheaper. I'm going to build it for boost anyhow so is it really worth me spending the money to get the HR motor. What makes it so better. In the end as I'm going to build both. Thanks for the help.