i have a busted motor mount on my 95 f150 351 5.8L v-8 is it a difficult job to replace them and how long about will it take.

 

How difficult something is depends on your experience, what tools you have, the work area, and the time constraints. I consider engine mounts to be VERY easy, but I've done a bunch. It would take me <1hr in my driveway, but it might take someone less mechanical several hours.