Forced induction to the rescue...Z06 or ZR1
https://www.onallcylinders.com/2019/...gm-lt-engines/
I don't know how much more room there is for large cams without risking piston to head contact or ruining the streetability of the car. The LT2 is probably not maxed out. Cams, porting, etc will net much more. Plus there is E85 for more cheap NA power.
https://www.hotrod.com/articles/0912...lock-and-cams/
[ame]https://www.youtube.com/watch?v=iRxxJCimvdE[/ame]