Heads question
You could get your existing heads ported, buy already ported heads, several other brands with new or ported variations of LS6 heads, 5.3 liter truck heads, etc.
I would ask this question on the Tech board, probably get more information than you will know what to do with. Probably won't be able to decide with so many options. Everyone that has done it one way or another will give you their specifics. Also, you can visit over at www.LS1Tech.com
I think you need to decide exactly what you want from the car, road race, drag race, or....in order to make the right choice.
However, if it was me I would get AFR 205's and be done with it. Expensive but worth it IMHO. It's what I did on my last Vette.
Good Luck
Nick






