...The 41-48 Service Bulletins are good to have....
They go well with the Ford Master Parts Manuals
Which are probably (all) available on cd thru epay.
Also, Things like the Green Bible are also a treasure trove of information.
And You've already mentioned Mac's,
Their catalogs are fantastic in that they are illustrated so it allows
you to see the differences between the same part
as it developed over the years.
It is also handy for identify the part that you may have
in your hand or more specifically,
the part you are missing/need.
Pictures are worth a thousand words
and when they are supplied with the Ford Part Numbers,
as is the case with all the above mentioned
top notch reference materials,
You will equip yourself with the
necessary ammunition to move forward for years to come.
..Personally, I deal with all years and models
so I have purchased all available Ford Master Parts Catalogs (CD's)
over the years (about 65,000? pages) as well as have many more
on paper and in binder form not to mention Microfiche..
The above list is whats currently available for Digitized Ford Master Parts Catalogs,
Most of the above sets were originally available from Ford as 2 part series
(on paper and on microfiche).
-That is to say Book 1 (of each set) was part numbers and Book 2 would be accompanying illustrations etc.
And you would use both in conjunction with each other as they are complimentary.
Over Time, A guy can pick and choose sets from the list and purchase as necessary (epay)...
...A good Ford based Reference Library for your particular years is a necessity
.