wow dude, i wouldnt do that stack at all. superdrol, halodrol, pheraplex, and furuza. seems like way too much at once.
how much you gain is going to be determined with diet. but you could gain 10lbs of lean mass from SD alone. if you wanted to go one step further you could bridge into something else after the SD, such as epi. or you could stack a non-methyl with the SD like m-lmg.
just trying to help your liver out a bit man. making your own stack is a much better way to go than buying these pre-made stacks that usually have underdosed amounts of certain ingredients.