I hate putting the cart before the horse,but my depression has moved to excitement now that I have a 6.0 on the way.Should have it in a couple of weeks
What kind of power should I expect from this thing??This is for sure what I'll be running,some things may change...
LQ4 6.0
Whipple charger 6 pounds boost
160 t-stat
Gibson shorty headers
True dual exhaust,2.5 inch,with x-pipe and Magnaflows
K&N Fipk
LT1 electric fans
43 pound/hr multec injectors
4.10 gears
Yank 3000 stall
Possible Westers PCM

I think thats it....

 

You should be running about 400 to 420 rear wheel hp...460 ft lbs of torque....

 

Sounds like the transmission will be next to go

 

Maybe you should put a cam? It sounds like the cam is really holding it back if peak hp is 4500 RPM.