Are all 5.3's the same?

[kerrige]

You can run a newer motor with just the long block. You will need the converter box, cam sensor deal and the knock sensors relocated. No need to swap intakes or throttle bodies. Oh and you will need a good custom tune. It will make a little more power then stock, but you would benefit from swapping to the newer intake etc. It's just a little more simple this way.

[468Blazer]

thanks for the info