600rwhp with lsa blower?
 

can get a complete lsa supercharger for $2200 and a set of ported ls9 heads. What else do you guys think it would take to reach 600rwhp? Or is it possible with this blower

The rest of the engine.

That's funny right there.

My apologies..my engine is a stock lq4

Yes, but... I think you will need a cam to get to 600rwhp (ls9 is cheap and plentiful) I wouldn't go with L9 Heads the the valves can wear the guides. On-line you can buy stock ZL1/CTSV castings for $376each and then spend the extra money on quality valves and springs. $228 for new hollow LS3 valves. $230 for Manley extreme duty exhaust valves and $229 for BTR .660 lift springs and then you can grow down the road. A good set of heads for boost $1440. GM CNC's LS3 heads are cheaper if aren't going to get crazy down the road with boost.

For what it's worth I run LS9's with stock valves and guides without issue. I've heard some concerns on the web, but I run 7k+ a lot and actually just had the heads apart to do a little hand porting and everything looked great.

Given the choice, I would stay away from the LS3 for boost due to the thinner deck, but I also run 22-25psi with a 4 bolt head.

Since you already have the LS9's I'd say run them, or if you're worried about it, throw some bronze guides in there and run them.

I don't have the ls9 heads but I know a guy that's selling a pair