Just got my 1985 GT-S, pretty much garbage condition but it's the only one I found in past 2 years. Is there any friend who live in CO that have experiences working on one of those? Shops are asking crazy prices for simple jobs. Looking to do a turbo setup

This group is MR2 based but there are a lot of other Toyota guys in it and many are familiar with the 4AGE and A series chassis.
https://www.facebook.com/groups/RMMOC/

Another great group with a number of people who could and likely would be willing to help you.
https://www.facebook.com/groups/coclassictoyotas/

I am in Carbondale CO but I can help you with things like parts and advice.

http://matrixgarage.com/

http://matrixgarage.com/content/yoshimi ... oing-4a-ge

https://www.facebook.com/MatrixGarage

I will actually be building my first top mount turbo manifold for longitudinal layouts for a customer in the next couple weeks.