does a turbo 350 or turbo 400 bolt up to my 95 z28
 

hey guys recently my transmission in my 95 z28 started to slip.. so one of my buddys has a turbo 350 or 400 in a gmc truck thats bolted up to a 350 im just curious to see if it will bolt up without a problem

Depending where they came from they or may or may not bolt up. However, even if they do fit they won't work properly being that the 95 transmission is controlled electronically and the 350 or 300 are not. You will probably have issues with drive shaft length and transmission mounts in addition to how the transmission work.

Plus having no OD won't help with your gas mileage.