1967 charger 383 2 barrel performance mods

Rebuilt, + 0.030", & a 4bbl to replace the original 2bbl.

I would try to find about more about what parts were used in the rebuild. Hotter cam?

Depending what has been done already, there might not be much else to be done without destroying drivability. It is a heavy car with a 383, not a 440.