Thank you guys, I really appreciate the information in your replies and you taking the time to help.
Just to elaborate. I’m not making a turbo build just NA and looking to make a usable 200-220.
Both the machinist I use and trust and his friend who has professionally built and raced Z’s both said to try and find out more but in their opinion I should just look for an N42 as that’s the route they have always taken. (Never used a P90 before)
That’s proving harder than it sounds and even though I have seen some available in Japan for sale by the time I ship and tax gets