I would agree. you can go down in carb or go up in cam.

I would go with a crane cams cam kit. they can be had for $100.
and $30 or less for gaskets.
the cam specs
Lift: .454''/.454''
Duration: 272°/272°
RPM Range: 2000-5000


thinking of the gaskets. did you use the manifold end seals when you installed the intake?

the seals that come with the gaskets need to be in the trash can and not on the engine.