LQ4 options
the goal here is a general rule of thumb is you dont run your injectors more than 80% duty cycle
I think he can get 450 with some good ported heads and a decent cam as long as the intake is decent.
Some AI 226s, healthy cam, fast 92mm I think he could do it, and not break the bank with a little help from the for sale section
The Best V8 Stories One Small Block at Time
Thats budget to me, ive got almost $2600 just in heads
With good port work on the ls6 heads, and measure ptv clearance and mill them as much as you can accordingly. That should be a nice bump in compression.

