One of the main reasons I decided on on '08 conversion vs. a 6.7 conversion is the wheel wells. I'm a little ocd on certain stuff, and having wheel wells from different eras would drive me nuts. It is a huge job to cut out the wheel wells from an '11+ super duty, and graft them into a rear quarter, and that's a job I wouldn't want, but would force myself to do if I went that route. Not only that, but I like the 6.4 front end better. If only it were more feasible to put a platinum 6.7 interior in the 6.4... Each generation has it's upsides, and I just can't justify the effort or cost to put them all in 1. To each their own though. I know some people couldn't care less about the wheel well differences, so for those people it's totally cool to do that. I'm sure there's stuff that I don't care about that probably drives others crazy.