regarding removing the screen.......
i've been member of SS owners association, website,
www.chirpthird.com
and several members also have bought GTO's, like me.
anyway, this topic has been around for years.
many, or most people that have removed screens had pinging problems and actually went backwards in performance. many had poor idle.
now, those that are heavily modded, cam, heads, forced induction, etc..., being higher level of performance are usually the ones that get "any" gain from removing the screen.
you'd probably get more performance gain by porting the MAF and removing half of the airfoil - "Chevy LS1/LS6 Performance", Author Christopher Endres
answer - if that's all you're doing, leave it alone :seeya: