74 duster kickdown
I think the first Magnums were 1992's and that they never came in a car; trucks only.
Somebody correct me if I'm wrong.... and they always had 4-speed/ O.D. (A-500 or A-518 trannys...)
Easy way to tell a 904 is the pan is fairly square with a corner knocked off.
The 727 pan is almost square, but kicks out about an inch for the dipstick tube.