Dave
Its a case of same-same, not the same. The big block Loadflite will bolt to
your Imperial. Some of the converters are the same as your Imperial. The
governor which controls the shift points are differant.
As you read this remember that if there was a differant internal part MoPar
had a differant part number for that complete unit. The HD torqueflite used in
the Imperials from 63-64 ( PN 2464426 ) had many of the same parts as the
same equal yeared L/Flite. The same is also true for the Imperial with the
transmission with PN 2408006.
Rodger & Gabby
Colo Spgs