Yep. The Chrysler 300C has a 5.7 Hemi, same as/similar to the one in the Ram.
These are the Hemis I could find:
Chrysler 300C: 5.7
Dodge Challenger R/T 1970: 426 (7.0)
Dodge Challenger SRT-8: 6.1
Dodge Charger Super Bee 1971: 426 (7.0)
Dodge Ram 1500: 5.7
Plymouth Superbird 1970: 426 (7.0)