Does it make any difference to timing if i put those 2 extra wires to ground and what might be the solution to get the timing from 12 to 15degrees what seems to be factory default

I have some running problems on my 360 with b200k. Timing for ignition is bit late. I have too renix box one with 407 ending number and one with 414 that was in that car when i bought it (i heard that it's on that number on 87->)
So does anyone know the differences between these boxes, atleast to ...