As already stated, you will probably gas wash your cylinders and possibly contaminate your
oil with gas. From a performance view point, the velocity of the air passing through an over sized carb will be lower than ideal, possibly resulting in poorer (is that a word?) throttle response.
I have a 351W, .030" oversize for a displacement of 357 cu. in., producing 472 HP. I have a Holley 750 DP which is certainly adaquate for this engine. I couldn't see any reason to go bigger than the 750.
Wayne