you cannot get rid of your advance unless you are running a race car, not practicly anyway, even tho 1 of the digital MSD box's can take care of timing advance... firing order also has nothing to do with how a ignition box works.. it fires on what cylinder is next on the cap, the magnetic pickup just triggers the interupt to pulse the coil. it's not going to matter firing order...

it might be best if you megasquirt the car and ditch the Bosch CIS.. that system is not good for modding.. MSII should work fine