timing chain
If GM feel the LS7 can be validated and released to production with a full factory warranty and 7,200 rpm limit using a single chain; why doubt the research and development. I reckon GM know more than your average John Doe.
If you were building a full-on race engine a double row chain gives peace of mind.
Other than that the stock LS2 chain (which is the GMPP heavy-duty chain offered for the LS1) is more than good enough.

