STI swap, built motor, big turbo, wanting 500-600hp, E85, still researching on a KAPS sequential. Just got the car three weeks ago and I love it too much fun.
This is my first video of the wrx taking on a big turbo stripped down VW on race gas, you never see him until I brake at the end of 4th. https://www.youtube.com/watch?v=JvEYu8KH6lU&list=UUX4snplURBwdwZJlvklNgoA
That's cool man. I really haven't heard of people doing swaps with the gr generation.... I would suggest just building the motor since they are both 2.5s and the sti seems more prone to ringland issues. you should definitely open up a build thread so we can watch your progress. But what do i know...
Welcome to the community, car looks great. Looking forward to seeing it progress. For the kind of power you are shooting for take a look at the short blocks being offered by TopSpeed.