Mopar Performance Carb 5.7L Crate Engine

You should definitely go with a Hemi. I'd only suggest that 5.7 crate motor if it's a smokin deal. I would recommend you build a 5.7/6.1, or buy a 6.1.

Yes, that flexplate is the same- 904/727.

TTI rejigged for the borgeson. They sent me a new drivers side header (thanks peter Bergman- dealer). I haven't taken it out of the box, but hopefully it's a better fit. The first one had some issues, but the main problem was the #1 primary. If that is fixed, it's definitely the way to go. I'll post a new thread when I get to that. I'm about to swap motors (pull 6.1, put in stroker) so I'll put in the new header then.