No personal experience but I've seen adapter kits to mate a 700R4 to a Mopar small block (downside is $$$$$$). They will fit without floor modifications that are needed with the A500 because the O/D portion they basically added to the rear of an A904 is so big. Sort of a bonus, unlike the A500 which the ECM controls O/D and TCC (at least up to '96), the 700R4 only uses electronic control for the TCC and O/D is purely mechanical.