I have zero experience with new gen hemi's and turbo's. I'm very interested in seeing what you find works.
Have you considered building a forged short block down the road? I would recommend it, in the event that you decide you want more power. I think your current power goals are attainable on a stock short block, but pushing much further will be in uncharted territory. Most LX guys keep it to 8 psi (or 10-12 psi if they're gambling men) on stock short blocks. Forged motors with head studs still lift heads somewhere at or after 20 psi, though.
What aftermarket K member are you planning on using?
Have you considered running the truck or jeep 5.7 log manifolds? Pointing them forward?
