Put a Z06 behind it with a push bumper.

That's a pretty open ended question. There are tons of build threads on these cars, I would suggest looking there and thinking about your budget. The short answer is you'd have to do a lot of work but there are different strategies that you'll have to decide on.

 

Two most common options:

1) Put forged pistons in your current B235
2) Swap in a T-5 B234 block from an 9000 Aero and use your T7 head to create what they call a Hybrid.

 

This is the wrong thread to post this in. Move to OG 9-3 .