Elwood2020

Thanks Mack technician. This is why I’m asking before I blow this thing up.  I’ll check the pressures and verify I don’t have leaks and flash the ecm to 460.  If you could let me know about the injectors and turbo that would be much appreciated! 
 

I have a 2003 ch613 with a e7-427 engine. Heavy haul ( double frame ) 4.42 gears, lift axle, 13 speed Eaton. 
I recently bought the truck and overhauled it.  It runs good , smooth , but it’s a slug with 80k on my lowboy. 
Has anyone done the rochester diesel upgrades? 
they suggest stage 2 injectors, manifold and turbo. Claiming 550hp range. ???  Before I spend the coin I was looking for some more feedback from other driver.  2 tuners and rochester diesel said to leave the ecm alone.  Any other options or suggestions would be greatly appreciated! 
thanks.