cam up grade opinions

[verticallatitude]

I have a 2003 5.7 EFI and was wondering if I could change the cam with out it runing lean or rich because I can't chance the pcm programing??
stock cam specs
Valve Timing:006
Duration:249/264
Duration @ .050" Lift:197/207
Lobe Separation:109
Intake Centerline:106
Valve Lift:430/450
Lobe Lift:
Valve Timing @ 0.006
proposed cam specs
Valve Timing:006
Duration:264 270
Duration @ .050" Lift:212/218
Lobe Separation:112
Intake Centerline:110
Valve Lift:488/499
Lobe Lift:325/33
Valve Timing @ 0.006