Need new piston rings, rod and crank bearings. Where is the best and cheapest place to obtain these? IS the 5.3 engine similar to the 6.0.... for these parts?

 

I am assuming USA??>

Look at our vendors on here.

I use XK Unlimited in San Louis Obispo, and they have helped many times over the years.

The 5.3 and 6ltr are the same in these components.

SNJ Barratt USA is another good source.

Others will have their favourites and pass by sooner or later.