my first big cycle was kinda the same...
used 40mg dbol a day + 400mg deca a week for 2 months, then swithed to 40mg dbol a day and 500mg of sust a week. this cycle was made for me by one of the best powerlifters in my country for that time.

i didnt know much about nutrition, so i ate basically BigMacs and pasta, althou - i gained around 22lbs first month and some 5lbs maybe after that - thats when i started to notice that long cycles dont work for me.

i gues lots of that weight was fat, but im 6'2 and was like 200lbs back then, so even if that was fat and water, ill always remember that cycle because that was the time when i got over 220lbs and have rarely(some brutal cutting) been below that again.