'67 383 would have 516 castings oem. Only 440s in '67 had the 915, but not all. Some early 440's had the carryover '66 158 castings.
If it's a late '67 block sent to the line for a '68 Charger, it could have 906's. If it's a '67 model engine that someone swapped into that Charger, it'll...