interesting.. but here is what I think.. the Toploader came out in 1963
Ford engines used a "round" bell housing bolt pattern.. since you have
a dual pattern block, it does not make a difference what the bell housing is
the top loader with bolt to either case..
as for flywheel.. clutch plate flex plate.... you will need to do more
internet research... I just did a quick look on the net, and found lots of info
so check it out...