OK. If you think it'll work, I'll give it a shot.
I would think a comp they'd be pretty much the same as long as you
got the right engine size, tranny and emissions.

 

i think the only difference is that the 91 may have had overdrive and 90 it may have not been an option yet.

 

How about this one?

https://www.ebay.com/itm/Engine-Cont...5/264215657117

 

The overdrive was an option in 89 and i think it stayed that way until the second gens.

 

i think that ecm should work. it is for a 91 5.9
but not in a d250. i don't believe they had the 46RH till 91. before that they only had the 42RH which is a light duty transmission which would have likely met a very quick death in a d250 with a 360.

 

Well, cross your fingers. I pulled the trigger on it.

 

Just got the ECM back that I'd sent in for repair.
I'd replaced it about 3 or 4 years back.
It has 7573 engraved on the back.
Cardone # 79-7573 is for a '91. I'm feeling better about the one I just bought.

 

A500, A518 and A618 where used back then. Basically the same as the 46/7RH.

 

you clearly don't know much about transmissions if you think a a500 is the same as a a518. they are not the same. the a500(42RH) is a weaker version of the. you put a weak transmission behind a engine in a heavy truck and you are just asking for it to fail which is why they continued to use the 727 in the heavier trucks till they made the a518

 

Well crap.That ECM was out of stock apparently.