A 904 Year Identification

What trans was in the Dakota ? 88-03 V-8's were Magnum's. Superior to the 360 they replaced.
Both were externally balanced so if you use that older 904 you will need a converter that is weighted.
Post 1970 transmissions are much better.
Not quite.
Magnums didn't come out until 1992 for the 318 and 1993 for the 360's.

The "Roller LA's" are 1989 - 1992 for the 360 and about 1987-88 to 1991 for 318's (one of the old books I've read mentioned Roller LA 318's as early as 1985, I have yet to confirm)
The A999 I pulled out of the 1988 diplomat had a Roller LA 318 in it.
And the Roller cammed LA 360 came out of a 1991 Ramcharger.
Both now residing in my duster.