Depending on what the cam is, it might already be "too big" and make a low end dog, AND a cam which is installed to the wrong "degree" (cam timing) can be a dog
As above............
The proper intake, IE something like an Edelbrock performer, or a factory 340/360 manifold
Not too big a carb
Good dual exhaust
And proper timing curve ............
will make the difference between a snotty little fun car to drive, and a complete dog.
An added bonus is gearing. Depending on tires / rear gear, something like a 2.73 rear gear is not going to be impressive.