Just found a set of Harland Sharp rockers for a Chevy Small block.
Does the Chevy small block by chance have the same rockers as the 3800?
I figured I'd ask since LS6 vlave springs work on 98+ 3800'*.

no, the */b chevy has 1.5 to 1 rockers
you can get 1.6 and 1.65 to 1 rockers but they wont fit the 3800.

ROD

You can get SBC roller rockers and SBF pedistal rockers to work for a Series 1 but not for a Series 2. Their is some stuff involved to get them to work but it really is not that hard. Problem is that it is really hard to find SBC rockers in ratio'* bigger then 1.65:1. IIRC only one company makes 1.8:1 SBC rockers and they are big $$. In SBF pedistal rockers the biggest ratio is 1.72:1 but they can be found really cheep ($100-$200 range).