I'm not trying to be an ass or offend you when I say this...
If you have to ask if a Victor is "too big," you shouldn't be using it.
Because of it's short runners, cam timing is critical. There is tons of airspeed in a long(er) runner manifold such as a Holley or RPM II (as Rob mentioned). There is not "tons" of airspeed with a Victor - it needs to be "created" with cam timing.
For a regular old hydraulic roller street 347, the Holley or RPM II is plenty, and much more friendly towards different company's OTS cams.
Joe