A Little Help. 1980s Truck 727 in an A Body?

Should fit just fine. Mopar upgraded the 727 internals over the years so the newer the better in most cases. I have one from a 1978 3/4 ton truck in my road runner. It could be a lock up converter which you may or may not want- but other than that most people cant tell the difference from a 1966 to a 1986 from looking at one.