The only difference between the two lowers are the fire/safe markings. One says fire and safe, the other has a bullet pictograms for fire and safe, and all your dpms parts should transfer over fine. But you will probably want to get a new mag catch with roll pin, and maybe trigger guard with roll pin, those can be kind of a pain to remove. Here is an assembly guide.
http://www.ar15.com/forums/t_3_4/226782_Assemble_your_own_LOWER__UPPER__FREE_FLOAT__TRIGGER__GAS_BLOCK___Step_by_step_instructions_.html