Blown 400+ horsepower easy? How much boost ?

[jonnyk]

Originally posted by T5superduty
I do not have forged internals. What do you think would be the complete maximum amount of boost my motor could handle? And Horsepower? I dont want to over do it.

What is in your bottom end? Stock 5.0L bottom ends can handle in the arena of 450 rwhp. I would think in the same neighborhood would be fine. It's all in the tune!
You won't be using an FMU with a carb though, they are all designed to run EFI pressures. There are websites that have info on blow-through setups, I would look into that a bit more.