blackdoublestack

I recently got the rods and mains replaced on the old girl (2001 CH613 460xt Pedigree) it dynoed at 374 hp to the wheel. Well, the 460 xt is rated at 493 and the wheel hp should be 394. I was thinking about getting high torque injectors, 20%. Has anyone bought these injectors from northwest truck in Edmonton, Canada. Is there any other tricks out there to get the ponys out of this motor?