Picked up a Magnum 5.2 for a turbo swap

So I grabbed a 2000 5.2 to build into a modest 500-550hp turbo motor to swap into my 88 D150 pickup.
It was free, and was a strong runner till it sat in the rain.
Since I need to install forged pistons, and oversize valves, I am not too concerned about the bit of corrosion inside.

This will almost certainly be a blow through carbureted setup, with the carb inside a box, for ease of tuning.

I will be shopping for forged pistons and a fairly modest cam, with 112-114’ish lobe separation.

the motor has about 200k on it, so most likely new roller lifters are in order?
Any suggestions?