While you've read the 377 can rev high, the cubic inches and the bore and stroke have nothing to do with how high it will rev. Rev is controlled with a iron fist by the valvetrain. If the cam runs out of breath at 5500 RPM, valve float will only be maybe 1000 or less RPM. Not just the cam plays the role, the valve springs play a huge role. Lets say you have a cam that says it's power band is 2000 - 6000 RPM. That means that it will effectively stop making power around the 6000 RPM range. However if you were to take a engine and slap a cam and valve train in that would rev to 8000 RPM, the next thing you have to consider is will the rods, crank and pistons hold up at that high RPM. Since it's got a contender intake which has a spread bore carb flange I would go with a Quadrajet.
Summit racing carry these carbs. Jet has a excellant line of Q-jets as does Sean Murphy Induction. When you have a good Quadrajet you get the best of both worlds. It's small primaries make for sensitive fuel injection like throttle response and good fuel economy. The massive secondaries are there when wide open throttle performance is needed.