I was wondering what the stock intake/exhaust valve sizes were on the stock 5.3 heads. Got a buddy that is getting a heck of a deal on some head work and was wanting a little info. He may be able to get me a similar deal so I was also curious on what I shoud have done if I do. Didn't know if he and I should go with larger valves while the heads were getting worked on.

 

1.89/1.55

 

Here is a little dicussio on 5.3 heads... https://ls1tech.com/ubb/cgi-bin/ulti...=005525#000000
I just found it and Jason got in with your answer.

 

Thanks guys. So yall think we should go with the 2.02/1.57 valves while they are out? Also what would be a good set of springs to put in incase I want to put a cam in later? I have also been thinking of either the Crane 1.8 or SLP 1.85 rockers instead. So what do yall think, cam or rockers?