[Andreaswoods]

I never found one for doing my 6.0, that was made by a manufacturer. You might find someone who assembled a bunch of kits into an all in one thing for you.

But, I would suggest:
1) a subscription to the full service manual, and read through the rebuild procedure so you know what bolts are single use and need to be replaced, as well as what specialized tooling you may need
2) make a list of all the gaskets and parts you need
3) find the kits to cover those parts (there are some top end kits, front cover, rear cover kits).

I would suggest ordering from rockauto, but know that some parts for your engine may not be listed under it, you may need to find the gm part number, then search for that number, to then add the part to your cart...

Yeah right.