Can anyone tell me how to tell the difference between a dynaflow and a 400 crank on a 401/425? Pictures would be great. Thanks. -Peter
Check to see if your crank flange is 2 7/8" in diameter or 2 1/2" in diameter (the boss where flywheel or flexplate attaches) The early (63 and earlier 401/425) Nailhead crank flange is 2 7/8" and the later (64-66 401/425) crank flange measures 2 1/2" across. Picture of Crank Cheryl
