5.3...are bigger valves worth the effort?

[JROBINSON1016]

i'm building a 5.3 with z06 cam ,springs & headers,is it worth the time & money to put in bigger valves or better off to stay with the factory valves,would it be worth the expense to do this or not much to gain vs. expense?

[jiveass]

im not sure the cost of swapping valves, but im sure it would be an improvement. 5.3 has dished pistons, so maybe you could also mill a little off the heads and get a compression bump while youre at it.