Looking for a 14 bolt FF, what years are interchangeable?

[garydan]

I have a 1985 Blazer, if I go to the junk yard, what year of truck should I be looking for if I want a 14 bolt FF rear? I've seen several on ebay, how do I know if it will fit my Blazer?

 

[b454rat]

If you get one from a 3/4 ton, it will bolt in. 73-80 will have them, then in 81 to 91, it was a heavy duty option, so might have to hunt around. 2wd will work, just need to change the shock mounts. 1 ton will work too, need to move the perches.

 

[cdoggwsu]

Search, search, search...there is already tons of info here about this.

The 14 Bolt Bible over at Pirate will help too.