If you have a pre-95 roller setup...there's no reason not to do it. The rollers are really nice to have and you never have to worry about killing a cam.
Just don't look for any performance gains, because it's the same cam you already have.
They're all the same, except for the oil pan gasket. Early ones have a multi-piece gasket, 6/86-on have a one-piece pan gasket.
Every other part of the shortblock is the same.