These are the 4.8L truck heads, already heavily decked and ported by the time I got them, but I'm not sure what was done to them otherwise. It was a common Heads option in the late 90s for the LS1. I'll have the shop take a look and see what they think. I just happen to have a set of LS7 valves around here somewhere. If they're better than what's in and they can work without a ton of extra machining work, then I'll use them, if not, pan it.
I was going to go with Morel Link-Bar lifters per Guy's recommendation. They seem very well regarded and cheap enough at $400~ for a set. I'm not trying to sping up past 7k, I would however like to get to 6,200~ as quickly as possible.
Thanks for the guidance on the rockers.
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