at 140 lbs, you do not have the solid foundation built to hold onto gains from steroids. Steroids are to be taken after you built a solid base and your natural gains have slowed significantly. If you cant gain weight, your diet sucks ass!! Steroids wont put size on your either unless you know how to eat properly, which Im betting you dont. Try eating like this
http://forums.steroid.com/showthread.php?t=113010
I guarantee you can put on some size just from eating like that and you dont need steroids to do it. Steroids arent a miracle drug, they reqire hard work and dedication in the gym and the kitchen. Sounds to me your looking for a get big quick solution, which isnt gonna work for ya.
BTW, do you know why you should take test w/ deca and dbol? You'll be finding out soon when your dick stops working b/c you have no testosterone in your body! Do you even know what PCT is? At least have enough sense to stop now and research on how to take steroids correctly before you fu(k your body up and become another statistic!