My friend has a Turbo out of a 92 Mx6, can I use this on my 85 N/A 12A? Knowing that it may take some fabrication.

 

"some" is not the word, With all the work you'd have to put into converting a Us 12A to a turbo you'd be better off ordering one from someone complete....So much work....plus the mx6 turbo wasn't a HUGE boost producer anyways, it was kinda there to help you merge on the interstate not eat up v8's....good luck.