1/2 to 14ff rear...

[bbchevy]

My 35" tires keep eating my 10 bolt alive. Im able to buy a 44hd front and a 14ff rear for $250. i have heard that in order to put a 1 ton rear in a 1/2 ton truck you have to move the spring perches... yet if you find a 3/4 14ff you dont have to. how can i tell whether its a 3/4 or a 1 ton before i buy it. and if it is a 1 ton, what is involved in moving the perches.

Also, the drive shaft is going to have to be changed to a 1 ton or 3/4 ton also, right?

Other than that stuff... am i going to need to get anything else? Brake lines? Spring plates? I want to get everything i need before i install it.

Thanks,
-Scott