727 transmission detail's ..... Please decode ???

[Valiant Steve]

727 transmission detail's ..... Can anyone give me some info. on the year or what this came out of also if it is a lockup or non lockup unit please the numbers on the pan rail are PK 3898869 5583 4100 Thanks !

 

[mopowers]

 

[VOETOM]

3898869, 3893763, 400/440, A-727, Long HD ext, Rr time. 1976 Dodge Truck. Agrees with MOPOWERS