c6 to e4od

here is the delema ive got a 93 e350 van with a six 300 and a c6 i also have a 93 e 350 with a 5.8 and a e4od .i want to put the e4od into the van with the 300 six.

option number 1 take the ecm from the 5.8 and the trans wireing and pigyback the 5.8 ecm to the six ecm and only cross conect the vehicle speed sensor and the tps signal.or will i need engine pip signal also and if so the pip signal will be from the six and the count will be to low.
will this work or not.

option 2 more cost involved buy a ecm that has the corect engine and trany combo and wire the ecm as intendedby ford .

option 3 get a stand alone controler and wire the trany aproperatly for this unit.

your input would be apreciated weather it is positive or not. ford did it why cant i also.