Oversized valves: good or bad?

baseline flow of stock intake valve 106 cfm with a 1.70 intake valve it was 130cfm 23% gain

the baseine flow of the stock exhaust valve was 77 cfm with a 1.44 valve was 103 cfm 34% gain
numbers taken from the Mopar performance six cylinder engnes manual. valve seats were enlarged( of course ) and blended