rick 1/1/2013The cost is less than a good auto tranny . The difficult level might be up there a bit if you have never done something like this . Keep in mind now you have to add things like a clutch and linkage . The drive shaft will have to be longer . You'll need a different fly wheel and now a bell housing for the new tranny . Don't forget ya got to cut a hole thru the floor for the shifter . In short your not going to do it in an afternoon with a six pack . If you still want to do it start getting parts little by little from want adds and swap meets or friends and junk yards . This will really help with the cost . Think about trading parts you take out for parts you need . It can be fun and you'll learn a butt load . And ask for help when you need it .
1beastlydude 1/22/2013I have done this with a much newer truck, indeed to agree with Rick, it is very labor intensive. It took me three days. first make sure you have everything you will need.
If you can find a used setup the price can be fair, but make sure you arn't buying a dud.
And difficulty , it depends on your skill and tool set, if you are working in a full service garage - moderate
if you are in your driveway with jackstands almost inpossible.
If you do go ahead and do it, please remember to keep the transmission going in lined up as perfect as possible... I had to line up a cluch three times before I got it right!