1985 f250 clutch

My son has a 1985 ford f250 4x4 with a 4 speed transmission. To shift the truck the clutch has to be all the way to the floor. It is beginning to grind to shift. I know that it has to have the clutch bleed. I couldn't find the slave cylinder to bleed. I was told that it has an internal slave cylinder. How much of a job is this to bleed? If I have to drop the tranny should I go ahead and replace the clutch also? Should I change everything, clutch, pressure plate, throw out bearing, slave cylinder, and the clutch cylinder to do this right? I hate the thought of dropping the tranny in this truck, seems like a major job. Any help would be great. Thanks.

Right below where the line goes into the tranny is the bleed valve. Bleed just like brakes. I ended up taking mine to a trans shop to replace the clutch and all. Did not have the gumption to pull that big beast out myself.