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Generally, stock heads are fine, including the cam. Since youre already forcing air through the head, porting doesnt become necessary until youre into the upper 300whp range.
The weak link is going to be blowing out the bottom end before anything. Rods and pistons should be your focus of a minor build (but you probably dont need that).
What kind of turbo are you planning on using? 15g-19t size? What fuel management?
Honestly, you need to pick a power goal, rather than psi. From there you can pick what parts you need, based on a little research. Its not boost that kills engines, its power.
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