Hey Jake, I've done the swap that you are talking about (2010 6spd challenger box to 2007 5.7). Everything stated above is correct, I ditched the remote linkage shifter and bought a CORE shifter to bolt in to the top. You also need a custom driveshaft with an adaptor to join the driveshaft to the back of the transmission. If you can get it cheap enough I'd say go for it, if it's on par with a T56 Magnum I'd say go that as they come with a few different options for speedo drives, and have a slip yoke. You'll just need the pilot bearing for the input shaft of the new transmission and pull the old one out of the back of the crank if it was an automatic tranny on your engine.
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Adaptor for driveshaft/tranny
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Removal of old
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New pilot bearing for TR6060
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Also remember these clutch slave cylinders are a self bleed system (no bleed nipple) can take a while to get the air out from my experience
I'm probably telling you stuff you already know though.
Good luck.