7 hours to find out...
 

I already had turbo Motor Mounts on my '83 N/A. The worst part was the one on the passenger's side was collapsed. I dont know what kind of fluid was used in those things, but it only came off of my engine and front Control arms with Silicone Lube spray.

Anyhoo, total replacement time was 7 hours. Of course (unlike PO) i set everything to proper torque. Although, most of those 7 hours was spent playing "while i'm under here..." (you know what i mean ;) )