Hello. Let me first start by sayin that I have researched and been thinkin about this for a while now. I know I will have guys say, "why" etc.
So here is what and why. I have a 2006 2500hd work truck I use and rely on it a lot! The 6.0 in it has 230k miles and has been progressively gotten a now huge engine noise. I suspect lifter failure, galling up lifter bore. Ok I can get an engine for it used for 1600 locally. (Tried a few yards and CL, etc.) But, I have access to two 5.3 lm7 engines(CHEAP) and not to mention they are plentiful and cheap ones available, average probably 500-700$.

I am going to swap the 6.0 for a 5.3. I know I will lose a lil hp and tq. But this will not effect the way I use this truck. So what all is needed? Spacer for my 4l80e flywheel, use 6.0 exhaust manifolds because my 6.0 has no egr. And possibly use my intake or can I use the 5.3 intake.

Just like to know info on swap. Not how silly of an idea this is for downsizing. Its just best option for me right now.

Thanks
Mikey