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without knowing the internal specs of the engine nobody can answer your question with any authority. If it is stock then we need to know the year and what it came out of.
OK, a guy near here yanked his 67 289 2V, took it apart, and did this:
Edelbrock Performer RPM intake manifold
Edelbrock 600 cfm carb
289HP air cleaner
C9OZ-6250-C hydraulic camshaft
home port-matching of the exhaust 289/302 Cylinder Head Port Matching
custom re-curve of the stock distributor
This engine was assembled and run-in on a dyno, and produced 321 hp.