Well the t5 out of an 86' was rated for lesser power than a stock t5 of 94', but it would fit.you'd have to use the bellhousing out of the 94', and the shifter and clutch for the 94' will line up. I dont think the drive shaft will work though. But I'm solely basing that off the fact if you went to order a new drive shaft, there is a different option from 79-93 and 94-98, and so on..... are you doing a manual swap? Or just looking to replace your t5 with something cheap?
2000 Mustang GT-Former giggle gas addict
1990 Mustang GT w/ Vortech V3
***resident gun idiot***