The 5.3, 5.7 6.0 are very swapable. most parts bolt up. I have 6.0 heads on my 5.7.
the motormounts are the same.
Reckless here had a 5.3 Iron block in his formula at one time.
the intakes are diffent, but someone told me the truck ones are better, just that due to clearance issues you cant stick one on a Fbody.