5.3 Rebuild

I have a 2000 5.3 that was pulled from a truck. It had some overheating issues. When i took the heads off all the coolant ports were clogged up with a rust looking crust. The number three piston had a small hole in it but it wasnt all the way through.
I would like to build a motor the would be in the 350-400 hp range and would be super reliable. I would like to get your opinions on what you would do and maybe even why. I dont know much but I am willing to learn and i would appreciate the advice.

wcodyp

Do a P&P and valve job on the stock heads. toss in a tr220, some Long Tubes, and a nelson tune to start

Another question is since it overheated would i have to bore the block out or can i do with just get it honed out. I can see shiny spots but i was told that was normal with a high mileage engine. Also i would have to replace that one piston for sure shouldnt i replace all of them at the same time? I know its olf the wall but could i use 4.8 pistons since they are flat topped to up the compression?

If you plan on doing F/I or nitrous I would put 4.8 flat tops in it. They are stronger and better for thing such as that. As for your other questions. I have no idea.

I want to run N/A but i also want to leave myself open where if i do want to upgrade i can without redoing everything, but that would be way down the road. i just want some thing soild to start with. And thanks for the help so far.

No problem. If your looking for information, this is the site to be on.

bore and stroke to a 5.7 all u need is ls1 rotating assy and machine work

Alright and thanks for all the help from both of you.

You can't use 4.8 pistons on 5.3/5.7 rods

nope, diff pistons, rod length, and stroke.